Peer-reviewed Journal Publications

1. A. Malachtari and G. Karapetsas “Dynamics and interaction of multiple evaporating droplets on compliant substrates” J. Fluid Mech. 978 (2024) A8 (https://doi.org/10.1017/jfm.2023.855) pdf
2. Z. Wang, G. Karapetsas, P. Valluri, C. Inoue, ”Flow Structure near Three Phase Contact Line of Low‑Contact‑Angle Evaporating Droplets” Appl. Phys. Lett. 124 (2024) 101603 (https://doi.org/10.1063/5.0197919) pdf
3. D. Pettas, G. Karapetsas, A. Syrakos, Y. Dimakopoulos and J. Tsamopoulos, ”Flow of Viscoelastic Films over Grooved Surfaces with Partial Wetting” J. Fluid Mech. 1000 (2024) A10 (https://doi.org/10.1017/jfm.2024.994) pdf
4. Z. Wang, G. Karapetsas, P. Valluri, C. Inoue, ”Role of volatility and thermal properties in droplet spreading: a generalisation to Tanner’s law” J. Fluid Mech. 987 (2024) A15 (https://doi.org/10.1017/jfm.2024.385) pdf
5. C. M. Linares, Y. Psarellis, G. Karapetsas, E.D. Koronaki and I.G. Kevrekidis “Physics-agnostic and Physics-infused machine learning for thin films flows: modeling, and predictions from small data” J. Fluid Mech. 975 (2023) A41 (https://doi.org/10.1017/jfm.2023.868) pdf
6. S. Kavuri, G. Karapetsas, C. S. Sharma, K. C. Sahu, “Freezing of sessile droplet and frost halo formation” Phys. Rev. Fluids 8 (2023) 124003 (https://doi.org/10.1103/PhysRevFluids.8.124003) pdf
7. C. Dritselis and G. Karapetsas “Open-source finite volume solvers for multiphase (n-phase) flows involving either Newtonian or non-Newtonian complex fluid” Computers and Fluids 245 (2022) 105590 (https://doi.org/10.1016/j.compfluid.2022.105590) pdf
8. D. Pettas, G. Karapetsas, Y. Dimakopoulos and Tsamopoulos “Stability analysis of a Newtonian film flow over hydrophobic micro-textured substrates” Phys. Rev. Fluids 7 (2022) 034004 (https://doi.org/10.1103/PhysRevFluids.7.034004) pdf
9. A. Marousis, D. Pettas, G. Karapetsas, Y. Dimakopoulos and Tsamopoulos “Stability analysis of viscoelastic film flows over an inclined substrate with rectangular trenches” J. Fluid Mechanics 915 (2021) A98 (https://doi.org/10.1017/jfm.2021.163) pdf
10. Z. Wang, G. Karapetsas, P. Valluri, K. Sefiane, A. Williams, Y. Takata “Dynamics of hygroscopic aqueous solution droplets undergoing evaporation or vapor absorption” J. Fluid Mechanics 912 (2021) A2 (https://doi.org/10.1017/jfm.2020.1073) pdf
11. A. G. L. Williams, G. Karapetsas, D. Mamalis, K. Sefiane, O. K. Matar and P. Valluri “Spreading and retraction dynamics of sessile evaporating droplets comprising volatile binary mixtures” J. Fluid Mechanics 907 (2020) A22 (https://doi.org/10.1017/jfm.2020.840) pdf
12. R. Nazareth, G. Karapetsas, K. Sefiane, O. K. Matar and P. Valluri “Stability of slowly evaporating thin liquid films of binary mixtures” Phys. Rev. Fluids 5 (2020) 104007 (https://doi.org/10.1103/PhysRevFluids.5.104007) pdf
13. D. Pettas, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos “Viscoelastic film flows over an inclined substrate with sinusoidal topography. I. Steady state” Phys. Rev. Fluids 4 (2019) 083303 (https://doi.org/10.1103/PhysRevFluids.4.083303) pdf
14. D. Pettas, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos “Viscoelastic film flows over an inclined substrate with sinusoidal topography. II. Linear stability analysis” Phys. Rev. Fluids 4 (2019) 083304 (https://doi.org/10.1103/PhysRevFluids.4.083304) pdf
15. G. Karapetsas, D. Photeinos, Y. Dimakopoulos, J. Tsamopoulos, “Dynamics and motion of a gas bubble in a viscoplastic medium under acoustic excitation” J. Fluid Mechanics 865 (2019) 381-413 (https://doi.org/10.1017/jfm.2019.49) pdf
16. M. Balla, M. K. Tripathi, K. C. Sahu, G. Karapetsas, O. K. Matar, “Non-isothermal bubble risecdynamics in a self-rewetting fluid: three-dimensional effects” J. Fluid Mechanics 858 (2019) 689-713 (https://doi.org/10.1017/jfm.2018.774) pdf
17. N. T. Chamakos, G. Karapetsas, A. G. Papathanasiou, “Effect of substrate topography, material wettability and dielectric thickness on reversible electrowetting” Colloids and Surfaces A, 555 (2018) 595-604 (https://doi.org/10.1016/j.colsurfa.2018.07.043) pdf
18. G. Karapetsas, N. T. Chamakos, A. G. Papathanasiou, “Thermocapillary droplet actuation: Effect of solid structure and wettability” Langmuir, 33 (2017)10838-10850 (http://pubs.acs.org/doi/10.1021/acs.langmuir.7b02762) pdf
19. D. Pettas, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “On the degree of wetting of a slit by a liquid film flowing along an inclined plane” J. Fluid Mechanics, 820 (2017) 5-41 (http://dx.doi.org/10.1017/jfm.2017.190) pdf
20. G. Karapetsas, N. K. Lampropoulos, Y. Dimakopoulos, J. Tsamopoulos, “Transient flow of gravity-driven viscous films over 3d patterned substrates: conditions leading to wenzel, cassie and intermediate states” Microfluidics & Nanofluidics, (2017) 21:17(http://dx.doi.org/10.1007/s10404-017-1853-3) pdf
21. N. T. Chamakos, G. Karapetsas, A. G. Papathanasiou “How asymmetric surfaces induce directional droplet motion” Colloids and Surfaces A: Physicochem. Eng. Aspects, 511 (2016) 180–189(http://dx.doi.org/10.1016/j.colsurfa.2016.09.078) pdf
22. G. Karapetsas, K. C. Sahu, O. K. Matar, “Evaporation of sessile droplets laden with particles and insoluble surfactants”, Langmuir, 32 (2016) 6871–6881 (http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.6b01042) pdf
23. M. Pavlidis, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “Steady viscoelastic film flow over 2d topography: II. The effect of capillarity, inertia and substrate geometry”, J. Non-Newt. Fluid Mech., 234 (2016) 201–214 (http://dx.doi.org/10.1016/j.jnnfm.2016.06.011) pdf
24. G. Karapetsas, N. T. Chamakos, A. G. Papathanasiou, “Efficient modelling of droplet dynamics on complex surfaces” J. Phys.: Condens. Matter 28 (2016) 085101 (http://dx.doi.org/10.1088/0953-8984/28/8/085101) pdf
25. D. Pettas, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “On the origin of extrusion instabilities: linear stability analysis of the viscoelastic die swell” J. Non-Newt.Fluid Mech. 224 (2015) 61-77 (http://dx.doi.org/10.1016/j.jnnfm.2015.07.011) pdf
26. G. Karapetsas, V. Bontozoglou “Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field” J. Non-Newt.Fluid Mech.  217 (2015) 1–13 (http://dx.doi.org/10.1016/j.jnnfm.2014.12.012) pdf
27. M. K. Tripathi, K. C. Sahu, G. Karapetsas and O. K. Matar, “Bubble rise dynamics in a viscoplastic material” J. Non-Newt.Fluid Mech.  222 (2015) 217–226  (http://dx.doi.org/10.1016/j.jnnfm.2014.12.003) pdf
28. M. K. Tripathi, K. C. Sahu, G. Karapetsas, K. Sefiane and O. K. Matar, “Non-isothermal bubble rise: non-monotonic dependence of surface tension on temperature” J. Fluid Mech. 763 (2015) 82- 108 (http://dx.doi.org/10.1017/jfm.2014.659) pdf
29. G. Karapetsas, K. C. Sahu, K. Sefiane and O. K. Matar, “Thermocapillary-driven motion of a sessile drop: effect of non-monotonic dependence of surface tension on temperature” Langmuir 30 (2014) 4310–4321 (http://dx.doi.org/10.1021/la5002682) pdf
30. G. Karapetsas and V. Bontozoglou, “The role of surfactants on the mechanism of the long-wave instability in liquid film flows”, J. Fluid Mech. 741 (2014) 139-155 (http://dx.doi.org/10.1017/jfm.2013.670) pdf
31. P. Saenz, P. Valluri, K. Sefiane, G. Karapetsas and O. K. Matar “On phase change in Marangoni-driven flows and its effects on the hydrothermal-wave instabilities”, Phys. Fluids 26 (2014) 024114 (http://link.aip.org/link/doi/10.1063/1.4866770) pdf
32. P.A.P. Swain, G. Karapetsas, O. K. Matar and K. C. Sahu, “Pressure-driven displacement of a viscoplastic material by a Newtonian fluid” Eur. J. of Mech.- B Fluids 49 (2015) 197–207 (http://dx.doi.org/10.1016/j.euromechflu.2014.08.010) pdf
33. G. Karapetsas and J. Tsamopoulos, “On the stick-slip flow from slit and cylindrical dies of a Phan-Thien and Tanner fluid model. II. Linear stability analysis”, Phys. Fluids 25 (2013) 093105 (http://link.aip.org/link/doi/10.1063/1.4821805) pdf
34. P. Saenz, P. Valluri, K. Sefiane, G. Karapetsas and O. K. Matar “Linear stability and numerical simulations of hydrothermal waves in planar liquid layers driven by thermocapillarity”, Phys. Fluids 25 (2013) 094101 (http://dx.doi.org/10.1063/1.4819884) pdf
35. G. Karapetsas and V. Bontozoglou , “The primary instability of falling films in the presence of soluble surfactants”, J. Fluid Mech. 729 (2013) 123-150 (http://dx.doi.org/10.1017/jfm.2013.291) pdf
36. G. Karapetsas, K. C. Sahu and O. K. Matar “Effect of contact line dynamics on the thermocapillary motion of a droplet on an inclined plate.”, Langmuir 29 (2013) 8892-8906 (http://dx.doi.org/10.1021/la4014027) pdf
37. G. Karapetsas and E. Mitsoulis, “Some experiences with the slip boundary condition in viscous and viscoelastic Flows”, J. Non-Newtonian Fluid Mech. 198 (2013) 96-108 (http://dx.doi.org/10.1016/j.jnnfm.2013.03.007) pdf
38. Y. Dimakopoulos, G. Karapetsas, N. A. Malamataris and E. Mitsoulis, “The Free (Open) Boundary Condition at Inflow Boundaries”, J. Non-Newtonian Fluid Mech. (2012) (http://dx.doi.org/10.1016/j.jnnfm.2012.09.001) pdf
39. G. Karapetsas, O. K. Matar, P. Valluri and K. Sefiane, “Convective rolls and hydrothermal waves in evaporating sessile drops”, Langmuir 28 (2012) 11433−11439 (http://pubs.acs.org/doi/abs/10.1021/la3019088) pdf
40. G. Karapetsas, R. V. Craster and O. K. Matar, “Surfactant-driven dynamics of liquid lenses”, Phys. Fluids 23 (2011) 122106 (http://link.aip.org/link/doi/10.1063/1.3670009) pdf
41. G. Karapetsas, R. V. Craster and O. K. Matar, “On surfactant enhanced spreading and superspreading of liquid drops on solid surfaces”, J. Fluid Mech. 670 (2011) 5-37 (http://dx.doi.org/10.1017/S0022112010005495) pdf
42. G. Karapetsas and J. Tsamopoulos, “On the stick-slip flow from slit and cylindrical dies of a Phan-Thien and Tanner fluid model. I. Steady state”, Phys. Fluids 21 (2009) 123101-18 (http://dx.doi.org/10.1063/1.3271495) pdf
43. J. Papaioannou, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “Injection of a viscoplastic material inside a tube or between two parallel disks: Conditions for wall detachment of the advancing front”, J. Rheol 53 (2009) 1155-1191 (http://dx.doi.org/10.1122/1.3191779) pdf
44. G. Karapetsas and J. Tsamopoulos, “Steady extrusion of viscoelastic materials from an annular die”, J. Non-Newt. Fluid Mech., 154 (2008) 136-152 (http://dx.doi.org/10.1016/j.jnnfm.2008.04.007) pdf
45. J. Tsamopoulos, Y. Dimakopoulos, N. Chatzidai, G. Karapetsas, M. Pavlidis, “Steady bubble rise and deformation in Newtonian and viscoplastic fluids and conditions for their entrapment”, J. Fluid Mech. 601 (2008) 123-164 (http://dx.doi.org/10.1017/S0022112008000517) pdf
46. G. Karapetsas and J. Tsamopoulos, “Transient squeeze flow of viscoplastic materials”, J. Non-Newtonian Fluid Mech. 133 (2006) 35–56 (http://dx.doi.org/10.1016/j.jnnfm.2005.10.010) pdf

1. Keynote Lecture, 10th International Bifurcations and Instabilities in Fluid Dynamics Symposium, Edinburgh, June 2024, “Unravelling the complex dynamics of wetting and phase change”
2. University of Edinburgh, School of Engineering, Edinburgh, United Kingdom, May 2016, “Droplet interaction with structured substrates”
3. University of Patras, Department of Chemical Engineering, Rio, Greece, September 2013, “Interfacial flows, contact lines, evaporation and the Marangoni effect”
4. 7th International Conference Material Technologies and Modeling, Ariel, ISRAEL, August 2012, “Surfactant-assisted superspreading of liquid drops on dry substrates”
5. Imperial College London, Department of Mathematics, London, UK, February 2011, “Dynamics of droplets on solid and liquid substrates”

1. S. Kavuri, G. Karapetsas, C. S. Sharma, K. C. Sahu, ”Evaporation‑driven coalescence of two droplets undergoing freezing”, 77th Annual Meeting of the Division of Fluid Dynamics, November 2024, Salt Lake City, Utah, USA
2. D. Debnath, A. Malachtari, G. Karapetsas, D. Orejon, K. Sefiane, A. Amirfazli, P. Valluri, ”Evaporation‑induced translation of Multiple Binary Droplets”, 77th Annual Meeting of the Division of Fluid Dynamics, November 2024, Salt Lake City, Utah, USA
3. A. Malachtari, I. Tsakelidis, G. Karapetsas,”Dynamics of drying particle‑laden droplets on soft viscoelastic substrates”, 1st European Fluid Dynamics Conference, September 2024, Aachen, Germany
4. P. Angelopoulos, C. Dritselis, G. Karapetsas,”Spreading of a droplet on a elastoviscoplastic substrate”, 14th Panhellenic Chemical Engineering Conference, May 2024, Thessaloniki, Greece
5. A. Malachtari, I. Tsakelidis, G. Karapetsas,”Evaporation of a sessile droplet laden with particles on a soft viscoelastic substrate”, 14th Panhellenic Chemical Engineering Conference, May 2024, Thessaloniki, Greece
6. A. Malachtari, I. Tsakelidis, G. Karapetsas,”Dynamics of clean and particle‑laden drying droplets on soft viscoelastic substrates”, 76th Annual Meeting of the Division of Fluid Dynamics, November 2023, Washington DC, USA
7. S. Kavuri, G. Karapetsas, C. S. Sharma, K. C. Sahu, ”On the dynamics of freezing sessile droplets: Frost haloformation”, 76th Annual Meeting of the Division of Fluid Dynamics, November 2023, Washington DC, USA
8. K. Thomson, G. Karapetsas, Y. Kita, K. Sefiane, D. Orejon, P. Valluri, ”Transient growth stability analysis of evaporating sessile drops comprising binary mixtures”, 76th Annual Meeting of the Division of Fluid Dynamics, November 2023, Washington DC, USA
9. D. Debnath, A. Malachtari, G. Karapetsas, K. Sefiane, D. Orejon, A. Amirfazli, P. Valluri, ”Evaporating populations of sessile droplets comprising binary mixtures”, 76th Annual Meeting of the Division of Fluid Dynamics, November 2023, Washington DC, USA
10. Z. Wang, G. Karapetsas, P. Valluri, I. Chihiro, ”Intricate Role of Thermal Properties and Volatility in Droplet Spreading: A Generalization to Tanner’s Law”, 76th Annual Meeting of the Division of Fluid Dynamics, November 2023, Washington DC, USA
11. A. Malachtari, G. Karapetsas, ”Evaporation of Multiple Droplets on a Soft Viscoelastic Substrate”, 11th International Conference on Boiling and Condensation Heat Transfer, May 2023, Edinburgh, Scotland, UK
12. K. Thomson, G. Karapetsas, O. K. Matar, Y. Kita, K. Sefiane, D. Orejon, P. Valluri, ”Transient growth analysis of evaporating sessile drops comprising binary mixtures”, 17th International Heat Transfer Conference, August
    2023, Cape Town, South Africa
13. C. M. Linares, E.D. Koronaki , Y. Psarellis, G. Karapetsas, I.G. Kevrekidis, “A machine learning approach to bridge the gap between the Kuramoto-Sivashinsky and the Navier-Stokes equations for thin film flow”, 2022 AIChE Annual Meeting, November 2022, Phoenix, Arizona, USA
14. Z. Wang, G. Karapetsas, P. Valluri, I. Chihiro, “Quantifying the interacting mechanisms in shape evolution of sessile volatile droplets”, 75th Annual Meeting of the Division of Fluid Dynamics, November 2022, Indianapolis, Indiana, USA
15. K. Thomson, A. G. Williams, G. Karapetsas, O. K. Matar, Y. Kita, K. Sefiane, D. Orejon, P. Valluri, “Transient growth stability analysis of evaporating sessile drops comprising binary mixtures”, 75th Annual Meeting of the Division of Fluid Dynamics, November 2022, Indianapolis, Indiana, USA
16. C. M. Linares, E.D. Koronaki , Y. Psarellis, G. Karapetsas, I.G. Kevrekidis, “From Navier-Stokes simulations for thin films to amplitude equations and back via physics-assisted machine-learning”, 75th Annual Meeting of the Division of Fluid Dynamics, November 2022, Indianapolis, Indiana, USA
17. A. Prasinou, M. Pavlidis, \G. Karapetsas, “Dynamics of droplet spreading on weakly viscoelastic liquid films”, 14th European Fluid Mechanics Conference, September 2022, Athens, Greece
18. A. Malachtari, G. Karapetsas, “Spreading dynamics of evaporating droplets on compliant substrates”, 14th European Fluid Mechanics Conference, September 2022, Athens, Greece
19. C. M. Linares, E.D. Koronaki , Y. Psarellis, G. Karapetsas, I.G. Kevrekidis, “A machine learning approach to bridge the gap between the Kuramoto-Sivashinsky and the Navier-Stokes equations for thin film flow”, 14th European Fluid Mechanics Conference, September 2022, Athens, Greece
20. C. Dritselis, G. Karapetsas, “Dynamics of liquid lens spreading over a viscoplastic liquid substrate”, 10th Hellenic Society of Rheology, June 2022, Skiathos, Greece
21. A. Chatzis-Mpakratsas, T. Vadarlis, S. Yiantsios, G. Karapetsas, “Linear stability analysis and dynamics of a drying viscoelastic polymer solution”, 13th Panhellenic Conference in Chemical Engineering, May 2022, Patras, Greece
22. A. Malachtari, G. Karapetsas, “Spreading dynamics of evaporating droplets on compliant substrates”, 13th Panhellenic Conference in Chemical Engineering, May 2022, Patras, Greece
23. K. Thomson, A. Williams, G. Karapetsas, O. Matar, Y. Kita, K. Sefiane, P. Valluri, “Stability of evaporating sessile drops comprising binary mixtures”, 17th UK Heat Transfer Conference, April 2022, Manchester, United Kingdom
24. C. Dritselis, G. Karapetsas, “Open-source finite volume solvers for the simulation of multiphase (n-phase) Newtonian/non-Newtonian fluid flows”, 74th Annual Meeting of the APS Division of Fluid Dynamics, November 2021, Phoenix, Arizona, USA
25. G. Karapetsas, G.-A. Ioannidis, “On the spreading of liquid lenses over rheologically complex liquid films”, 74th Annual Meeting of the APS Division of Fluid Dynamics, November 2021, Phoenix, Arizona, USA
26. K. Thomson, G. Karapetsas, O. Matar, P. Valluri, A. Williams, K. Sefiane, “Transient growth stability analysis of evaporating sessile drops comprising binary mixtures”, 74th Annual Meeting of the APS Division of Fluid Dynamics, November 2021, Phoenix, Arizona, USA
27. K. Thomson, A. Williams, G. Karapetsas, O. Matar, Y. Kita, K. Sefiane, P. Valluri, “Stability of evaporating drops comprising binary mixtures”,5th International Conference on Droplets, August 2021, Darmstadt (Virtual), Germany
28. C. Dritselis, G. Karapetsas, “A numerical study of a droplet spreading between Newtonian and viscoplastic stratified fluids” Droplets 2021, August 2021, Darmstadt (Virtual), Germany
29. G.-A. Ioannidis, O. K. Matar, G. Karapetsas, “Droplet spreading over a non-Newtonian liquid film” 73rd Annual Meeting of the APS Division of Fluid Dynamics, November 2020, Chicago (Virtual), USA
30. C. Dritselis, G. Karapetsas, “Numerical study of non-linear dynamics of liquid lenses spreading over a viscoplastic liquid layer” 73rd Annual Meeting of the APS Division of Fluid Dynamics, November 2020, Chicago (Virtual), USA
31. A. Hatzis-Mpakratsas, G. Karapetsas, “Dynamics of a drying viscoelastic polymer solution” 73rd Annual Meeting of the APS Division of Fluid Dynamics, November 2020, Chicago (Virtual), USA
32. K. Thomson, A. Williams, G. Karapetsas, O. K. Matar, K. Sefiane, P. Valluri, “Stability of evaporating sessile drops comprising binary mixtures” 73rd Annual Meeting of the APS Division of Fluid Dynamics, November 2020, Chicago (Virtual), USA
33. Z. Wang, G. Karapetsas, P. Valluri, K. Sefiane, Y. Takata, “Spreading of hygroscopic ionic solution droplets during vapor absorption” 73rd Annual Meeting of the APS Division of Fluid Dynamics, November 2020, Chicago (Virtual), USA
34. G. Karapetsas, A. Vadarlis, “Effect of viscoelasticity on the stability characteristics of a drying polymer solution” 72nd Annual Meeting of the APS Division of Fluid Dynamics, November 2019, Seattle, USA
35. D. Pettas, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “Flow stability of a liquid film partially wetting a substrate with rectangular trenches” 72nd Annual Meeting of the APS Division of Fluid Dynamics, November 2019, Seattle, USA
36. R. Nazareth, G. Karapetsas, P. Saenz, O. Matar, K. Sefiane, P. Valluri, “The stability of evaporating binary liquid film heated from below” 72nd Annual Meeting of the APS Division of Fluid Dynamics, November 2019, Seattle, USA
37. Z. Wang, G. Karapetsas, P. Valluri, A. Williams, K. Sefiane, Y. Takata, “Lubrication model for vapor absorption into hygroscopic liquid desiccant droplets” 72nd Annual Meeting of the APS Division of Fluid Dynamics, November 2019, Seattle, USA
38. A. Williams, G. Karapetsas, P. Saenz, O. Matar, K. Sefiane, P. Valluri, “Stability of evaporating sessile drops comprising binary mixtures” 72nd Annual Meeting of the APS Division of Fluid Dynamics, November 2019, Seattle, USA
39. D. Pettas, G. Karapetsas, J. Tsamopoulos, “Stability of a viscoelastic film flowing over a substrate with sinusoidal corrugations” 12th Panhellenic scientific conference in Chemical Engineering, Athens, May 2019
40. G. Karapetsas, J. Tsamopoulos, D. Pettas, “Stability of film flow over a substrate with rectangular trenches forming air inclusions” 12th Panhellenic scientific conference in Chemical Engineering, Athens, May 2019
41. G. Karapetsas, A. Williams, P. Saenz, O. Matar, K. Sefiane, P. Valluri, “Evaporation of binary sessile drops” 12th Panhellenic scientific conference in Chemical Engineering, Athens, May 2019
42. Z. Wang, G. Karapetsas, P. Valluri, A. Williams, K. Sefiane and Y. Takata, “Lubrication model for vapor absorption into hygroscopic liquid desiccant droplets” 16th UK Heat Transfer Conference, September 2019, Nottingham, UK
43. A. Williams, P. Saenz, G. Karapetsas, K. Sefiane, O. K. Matar, P. Valluri, “Evaporation of binary mixtures: pools and droplets” 16th International Heat Transfer Conference, August 2018, Beijing, China
44. M. K. Tripathi, M. Balla, K. C. Sahu, G. Karapetsas, O. K. Matar, “Non-isothermal bubble rise dynamics in a self-rewetting fluid at high Marangoni numbers” 71st Annual Meeting of the APS Division of Fluid Dynamics, November 2018, Atlanta, USA
45. R. Nazareth, G. Karapetsas, S. Harish, D. Orejon, K. Sefiane, P. Valluri, “The stability of evaporating binary liquid film heated from below” 71st Annual Meeting of the APS Division of Fluid Dynamics, November 2018, Atlanta, USA
46. G. Karapetsas, D. Photeinos, Y. Dimakopoulos, J. Tsamopoulos, “Use of acoustic excitation to enhance the mobility of buoyancy driven bubbles inside a viscoplastic material” 71st Annual Meeting of the APS Division of Fluid Dynamics, November 2018, Atlanta, USA
47. A. Williams, G. Karapetsas, P. Saenz, O. K. Matar, K. Sefiane, P. Valluri, “Spreading and evaporation of sessile drops comprising binary mixture” 71st Annual Meeting of the APS Division of Fluid Dynamics, November 2018, Atlanta, USA
48. D. Pettas, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “Linear stability of viscoelastic film flow over structured surfaces” 71st Annual Meeting of the APS Division of Fluid Dynamics, November 2018, Atlanta, USA
49. G. Karapetsas, D. Photeinos, Y. Dimakopoulos, J. Tsamopoulos, “Acoustic excitation of a bubble inside a viscoplastic medium” 12th European Fluid Mechanics Conference, September 2018, Vienna,Austria
50. D. Pettas, G. Karapetsas, Y. Dimakopoulos, J. Tsamopoulos, “Stability analysis of viscoelastic fluid over a structured topography” 12th European Fluid Mechanics Conference, September 2018, Vienna, Austria
51. N. T. Chamakos, G. Karapetsas, A. G. Papathanasiou, “Mechanisms of wetting transitions of electrowetting on patterned surfaces: effect of surface topography, material wettability and dielectric thickness on reversibility” Electrowetting conference – 11th International conference, June 2018, Twente, Netherlands
52. G. Karapetsas, N. T. Chamakos, A. G. Papathanasiou, “Thermocapillary droplet actuation on structured solid surfaces” 70th Annual Meeting of the APS Division of Fluid Dynamics, November 2017, Denver, USA
53. Y. Dimakopoulos, D. Pettas, G. Karapetsas, J. Tsamopoulos, “Linear Stability analysis of a Newtonian film flowing over a substrate with topographical features” 70th Annual Meeting of the APS Division of Fluid Dynamics, November 2017, Denver, USA
54. A. Williams, P. Saenz, G. Karapetsas, O. K. Matar, K. Sefiane, P. Valluri, “Lubrication model for evaporation of binary sessile drops” 70th Annual Meeting of the APS Division of Fluid Dynamics, November 2017, Denver, USA
55. M. Tripathi, A. Premlata, K. C. Sahu, G. Karapetsas, O. K. Matar, “Non-isothermal bubble rise dynamics in a self-rewetting fluid”, 70th Annual Meeting of the APS Division of Fluid Dynamics, November 2017, Denver, USA
56. G. Karapetsas, N. Lampropoulos, Y. Dimakopoulos, J. Tsamopoulos, “Transient coating of substrates with variable topography by  viscous films: 3D simulations” 11th Panhellenic scientific conference in Chemical Engineering, Thessaloniki, May 2017
57. A. Georgantaki, G. Karapetsas, M. Vlachogiannis and V. Bontozoglou, “Liquid film flow with soluble surfactants: Theory and experiment”, International Conference on Multiphase Flow, May 2016, Firenze, Italy
58. N. Chamakos, G. Karapetsas and A. G. Papathanasiou, “Modelling of droplet mobility on bio-inspired asymetrically structured substrates”, Smart and Green Interfaces Conference, May 2016, Athens, Greece
59. G. Karapetsas, K. C. Sahu and O. K. Matar, “Dynamics of surfactant-laden evaporating droplets”, 68th Annual Meeting of the APS Division of Fluid Dynamics, November 2015, Boston, USA
60. D. Mamalis, K. Sefiane, K. C. Sahu, G. Karapetsas and O. K. Matar, “Non-isothermal spreading dynamics of self-rewetting droplets”, 68th Annual Meeting of the APS Division of Fluid Dynamics, November 2015, Boston, USA
61. A. Premlata, M. Tripathi, K. C. Sahu, G. Karapetsas, K. Sefiane, O. K. Matar, “Threedimensional simulations of a rising bubble in a self-rewetting fluid”, 68th Annual Meeting of the APS Division of Fluid Dynamics, November 2015, Boston, USA
62. G. Karapetsas, N. T. Chamakos, A. G. Papathanasiou, “Effect of substrate topography on the thermocapillary migration of droplets under microgravity”, 22nd ELGRA Symposium and General Assembly Sept 2015, Corfu, Greece
63. G. Karapetsas, V. Bontozoglou, “Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field”, Conference on Modelling Fluid Flow (CMFF’15), Sept 2015, Budapest, Hungary
64. N. T. Chamakos, G. Karapetsas, M. Kavousanakis, A. G. Papathanasiou, “Efficient modelling of droplet spreading on rough surfaces”, 8th GRACM International Congress on Computational Mechanics, July 2015, Volos, Greece
65. G. Karapetsas, V. Bontozoglou, “The effect of soluble surfactants on the linear stability of liquid film flow”, 8th GRACM International Congress on Computational Mechanics, July 2015, Volos, Greece
66. G. Karapetsas and V. Bontozoglou, “Non-linear evolution of a viscoelastic film under the influence of DC and AC electric fields”, 10th Panhellenic Scientific Chemical Engineering Congress, June 2015, Patras, Greece
67. G. Karapetsas, N. T. Chamakos, A. G. Papathanasiou, “Modelling droplet interaction with flat or structured solid surfaces”, 10th Panhellenic Scientific Chemical Engineering Congress, June 2015, Patras, Greece
68. N. T. Chamakos, G. Karapetsas, M. Kavousanakis, A. G. Papathanasiou, “Droplet passive movement on asymmetric patterned surfaces”, 10th Panhellenic Scientific Chemical Engineering Congress, June 2015, Patras, Greece
69. D. Pettas, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos, “Linear stability analysis of the viscoelastic extrusion flow from a planar die”, 10th Panhellenic Scientific Chemical Engineering Congress, June 2015, Patras, Greece
70. D. Pettas, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos, “Linear stability analysis of viscoelastic fluid extrusion through a planar die”, 10th Annual European Rheology Conference AERC, April 2015, Nantes, France
71. G. Karapetsas, N. T. Chamakos, M. E. Kavousanakis and A. G.Papathanasiou, “Modeling of dynamic contact lines”, Smart and Green Interfaces Conference – 2015, Joint with COST MP1106 Annual MC meeting, March 2015, Belgrade, Serbia
72. G. Karapetsas and V. Bontozoglou “Non linear evolution of the electrohydrodynamic instability of a Newtonian or viscoelastic film under a spatially periodic electric field” FLOW 2014, December 2014, Athens, Greece
73. D. Pettas, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos “Linear stability of the viscoelastic extrusion flow from a slit die” FLOW 2014, December 2014, Athens, Greece
74. M. Tripathi, K. C. Sahu, G. Karapetsas and O. K. Matar “The dynamics of rising bubble inside a viscoplastic material” 67th Annual Meeting of the APS Division of Fluid Dynamics, November 2014, San Fransisco, California, USA
75. O. K. Matar, M. Tripathi, K. C. Sahu, G. Karapetsas and K. Sefiane “Thermocapillary motion of bubble under the action of gravity in a self-rewetting fluid” 67th Annual Meeting of the APS Division of Fluid Dynamics, November 2014, San Fransisco, California, USA
76. G. Karapetsas & V. Bontozoglou “Non-linear dynamics of viscoelastic liquid trilayers subjected to an electric field” 67th Annual Meeting of the APS Division of Fluid Dynamics, November 2014, San Fransisco, California, USA
77. C. Dritselis, G. Karapetsas & V. Bontozoglou “Non-linear dynamics of viscous bilayers subjected to an electric field: 3D phase field simulations” 67th Annual Meeting of the APS Division of Fluid Dynamics, November 2014, San Fransisco, California, USA
78. K. C. Sahu, M. Tripathi, O. K. Matar and G. Karapetsas “Numerical simulation of rising bubble with chemical reaction” 67th Annual Meeting of the APS Division of Fluid Dynamics, November 2014, San Fransisco, California, USA
79. G. Karapetsas and V. Bontozoglou, “Non-linear dynamics of the electro-hydrodynamic patterning of viscoelastic materials” EFMC10 – European Fluid Mechanics Conference, September 2014, Copenhagen, Denmark
80. G. Karapetsas and V. Bontozoglou, “The effect of soluble surfactants on the linear stability of liquid film flow” EFMC10 – European Fluid Mechanics Conference, September 2014, Copenhagen, Denmark
81. G. Karapetsas and V. Bontozoglou, “A numerical study of electrohydrodynamic patterning of viscoelastic materials ” 7th Conference of the International Marangoni Association, June 2014, Vienna, Austria, p.68
82. G. Karapetsas and V. Bontozoglou, The primary instability of falling films in the presence of soluble surfactants, 10th HSTAM 2013 International Congress on Mechanics, 25-27 May 2013, Chania, Greece
83. G. Karapetsas, M. Tripathi, K. C. Sahu and O. K. Matar, “Bubble rise in the presence of chemical reactions and non-newtonian effects”, 2014 INNFM Meeting on Rheometry and General Rheology, April 2014, UK
84. P. A.P. Swain, G. Karapetsas, O. K. Matar and K. C. Sahu, “Pressure-driven displacement of a viscoplastic material by a Newtonian fluid” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
85. V. Bontozoglou and G. Karapetsas, “The stabilizing mechanism of surfactants in falling films” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
86. K. Sefiane, M. Tripathi, K. C. Sahu, G. Karapetsas and O. K. Matar, “Bubble rise in a non-isothermal channel with a non-monotonic dependence of the surface tension on temperature” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
87. M. Tripathi, K. C. Sahu, G. Karapetsas and O. K. Matar, “Numerical simulation of a bubble rising in an unconfined viscoplastic fluid with chemical reaction” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
88. P. Saenz, P. Valluri, K. Sefiane, G. Karapetsas, J. Kim and O. K. Matar, “Dynamics of evaporating sessile droplets” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
89. J. Tsamopoulos and G. Karapetsas, “Linear stability analysis of the stick-slip flow of a viscoelastic fluid following the Phan-Thien Tanner model” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
90. G. Karapetsas, K. C. Sahu, K. Sefiane and O. K. Matar, “Thermocapillary-driven motion of a droplet on an inclined substrate: contact line dynamics, and non-monotonic dependence of surface tension on temperature” 66th Annual Meeting of the APS Division of Fluid Dynamics, November 2013, Pittsburgh, Pennsylvania, USA
91. G. Karapetsas and V. Bontozoglou, “Linear stability of falling films in the presence of soluble surfactants”, 27th European Colloid and Interface Society (ECIS) Conference, September 2013, Sofia, Bulgaria
92. G. Karapetsas, K. C. Sahu and O. K. Matar, “The effect of varying substrate wettability on the thermocapillary motion of droplets”, 27th European Colloid and Interface Society (ECIS) Conference, September 2013, Sofia, Bulgaria
93. E. Mitsoulis and G. Karapetsas, “Some experiences with slip boundary condition in viscous and viscoelastic flows”, Annual European Rheology Conference, April 2013, Leuven, Belgium
94. G. Karapetsas, K. Sahu and O. K. Matar, “Thermocapillary motion of a droplet on an inclined plate” 65th Annual Meeting of the APS Division of Fluid Dynamics, November 2012, San Diego, California, USA, p. 261
95.  A. Georgantaki, G. Karapetsas and V. Bontozoglou, “Dynamics of an inclined film in the presence of soluble surfactants” 65th Annual Meeting of the APS Division of Fluid Dynamics, November 2012, San Diego, California, USA, p. 374
96. P. Saenz, P. Valluri, K. Sefiane, G. Karapetsas and O. K. Matar, “On phase change in thermocapillary flows” 65th Annual Meeting of the APS Division of Fluid Dynamics, November 2012, San Diego, California, USA, p. 317
97. K. Sefiane, P. Saenz, P. Valluri, G. Karapetsas and O. K. Matar, “Two-phase investigation of hydrothermal waves in saturated interfaces” 65th Annual Meeting of the APS Division of Fluid Dynamics, November 2012, San Diego, California, USA, p. 260
98. G. Karapetsas, A. Georgantaki and V. Bontozoglou, “Dynamics of a surfactant-laden falling film”, International Focus Workshop on Multiscale Complex Fluid Flows and Interfacial Phenomena, October 2012, Dresden, GERMANY
99. G. Karapetsas, R. V. Craster and O. K. Matar, “Spreading, retraction and sustained oscillations of surfactant-laden lenses”, 64th Annual Meeting of the APS Division of Fluid Dynamics, November 2011, Baltimore, Maryland, USA, p. 94
100. G. Karapetsas, P. Valluri, K. Sefiane and O. K. Matar, “Convective rolls and hydrothermal waves in evaporating sessile drops”, 64th Annual Meeting of the APS Division of Fluid Dynamics, November 2011, Baltimore, Maryland, USA, p.94
101. P. Saenz, G. Karapetsas, P. Valluri, K. Sefiane and O. K. Matar, “Numerical study of thermocapillary instabilities in evaporating annular pools and sessile droplets”, 64th Annual Meeting of the APS Division of Fluid Dynamics, November 2011, Baltimore, Maryland, USA, p. 201
102. G. Karapetsas, R. V. Craster and O. K. Matar, “Dynamics of surfactant-laden drops on liquid substrates”, Bifurcations and Instabilities in Fluid Dynamics, July 2011, Barcelona, SPAIN
103. G. Karapetsas, K. Sefiane, R. V. Craster and O. K. Matar, “Linear stability analysis on the evaporation of sessile drops: formation of hydrothermal waves ”, Bifurcations and Instabilities in Fluid Dynamics, July 2011, Barcelona, SPAIN
104. G. Karapetsas, R. V. Craster and O. K. Matar, “Surfactant-induced superspreading of liquid drops on solid substrates”, 63nd Annual meeting of the APS division of fluid dynamics, November 2010, Long Beach, California, USA, p. 110
105. G. Karapetsas, P. Saenz, K. Sefiane, P. Valluri, O. Matar, “Numerical study of the evaporation of sessile drops: formation of hydrothermal waves”, 63nd Annual meeting of the APS division of fluid dynamics, November 2010, Long Beach, California, USA, p. 65
106. P. Saenz, P. Valluri, G. Karapetsas, K. Sefiane and O. K. Matar, “Hydrothermal waves in evaporating annular pools and sessile drops using DNS”, 63nd Annual meeting of the APS division of fluid dynamics, November 2010, Long Beach, California, USA, p. 403
107. G. Karapetsas, O. K. Matar and R. V. Craster, “Surfactant enhanced spreading of liquid drops on solid surfaces”, 8th International Conference of Computational Methods in Sciences and Engineering, ICCMSE 2010, Kos, Greece, October 2010
108. G. Karapetsas, R. V. Craster and O. K. Matar, “Spreading of surfactant-laden drops on solid surfaces ”, 24th European Colloid and Interface Society (ECIS) Conference 2010, Prague, CZECH REPUBLIC
109. G. Karapetsas & J. Tsamopoulos, “Linear stability analysis for the stick-slip flow in cylindrical or planar die of a viscoelastic fluid”, 7th Panhellenic scientific conference in Chemical Engineering, Patras, June 2009
110. I. Papaioannou, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos, “Injection molding of a viscoplastic material in a cylindrical pipe or between two parallel disks”, 7th Panhellenic scientific conference in Chemical Engineering, Patras, June 2009
111. J. Papaioannou, G. Karapetsas, Y. Dimakopoulos and J. Tsamopoulos, “Injection of a viscoplastic material inside a pipe or in the space between two parallel disks: Conditions for wall detachment”, AERC 2009, 6th Annual European Rheology Conference, Cardiff, UK, April 2009
112. G. Karapetsas and J. Tsamopoulos “Linear stability analysis of the cylindrical or planar stick-slip flow for a PTT fluid model”, 6th Annual European Rheology Conference, AERC, Cardiff, UK, April 2009
113. J. Tsamopoulos, Y. Dimakopoulos, N. Chatzidai, G. Karapetsas and M. Pavlidis, “Steady bubble rise and deformation in Bingham fluids and conditions for their entrapment”, 4th Annual European Rheology Conference, AERC, Napoli, ITALY, April 2007, p. 227
114. J. Tsamopoulos, Y. Dimakopoulos, N. Chatzidai, G. Karapetsas and M. Pavlidis, “Steady bubble rise and deformation in Newtonian and Bingham fluids and conditions for their entrapment”, 6th European congress of chemical engineering, Copenhagen, Denmark, September 2007, p. 245, volume 2
115. J. Tsamopoulos, Y. Dimakopoulos, N. Chatzidai, G. Karapetsas and M. Pavlidis, “Steady bubble rise and deformation in Bingham fluids and conditions for their entrapment”, XVth International Workshop on Numerical Methods for non-Newtonian Flows, Rhodes, GREECE, June 2007, p. 42
116. G. Karapetsas & J. Tsamopoulos, “Axisymmetric linear stability analysis of the extrusion of viscoelastic materials through an annular die”, 6th Panhellenic scientific conference in Chemical Engineering, Athens, May 2007
117. M. Pavlidis, G. Karapetsas, N. Chatzidai, Y. Dimakopoulos and J. Tsamopoulos, “Steady flow, deformation and entrapment of bubbles in a viscoplastic fluid”, 6th Panhellenic scientific conference in Chemical Engineering, Athens, May 2007, p. 1057
118. N. Chatzidai, G. Karapetsas, M. Pavlidis, Y. Dimakopoulos και J. Tsamopoulos, “Flow and deformation of a bubble rising in a viscoplastic material”, FLOW 2006, Patras, November.2006, p. 17
119. G. Karapetsas & J. Tsamopoulos, “Axisymmetric linear stability analysis for the extrusion of viscoelastic fluids”, FLOW 2006, Patras, November. 2006, p. 18
120. G. Karapetsas and J. Tsamopoulos, “Viscoelastic simulations of the extrudate swell problem using the PTT model”, 6th EUROMECH Fluid Mechanics Conference, Stockholm, SWEDEN, June 2006, p. 267
121. G. Karapetsas and J. Tsamopoulos, “A numerical study of extrudate swell for viscoelastic fluids”, AERC 2006, 3nd Annual European Rheology Conference, Hersonisos, GREECE, April 2006, p. 18
122. G. Karapetsas & J. Tsamopoulos, “Squeeze flow of viscoplastic materials fully accounting for the highly deforming domain of the material”, 5th GRACM International Congress on Computational Mechanics, Limassol, CYPRUS, July 2005, p. 613-620
123. G. Karapetsas & J. Tsamopoulos, “Transient simulation of the squeeze flow of a viscoplastic material between two parallel disks”, 5th Panhellenic scientific conference in Chemical Engineering, Thessaloniki, May 2005. p. 797-800
124. G. Karapetsas and J. Tsamopoulos, “Transient squeeze flow of viscoplastic materials”, AERC 2005, 2nd Annual European Rheology Conference, Grenoble, FRANCE, April 2005, p. 163
125. G. Karapetsas and J. Tsamopoulos, “Transient squeeze flow of viscoplastic materials”, 77th Annual meeting of SOR (Society of Rheology), Vancouver, CΑΝΑΔΑ, October 16-20, 2005, p. 63
126. G. Karapetsas & J. Tsamopoulos, “Transient simulation of the squeeze flow of a viscoplastic material between two parallel plates”, FLOW 2004, Athens, November 2004, p. 252-259
127. G. Karapetsas, N. Chatzidai, M. Pavlidis and J. Tsamopoulos, “Τransient squeeze flow of viscoplastic liquids”, HSR 2004, Athens, Greece, June 2004, p. 50