The Hellenic Society of Rheology (HSR) is proud to announce that Associate Professor Pavlos S. Stephanou has been selected as the recipient of the 2025 Tasos C. Papanastasiou Award!
This prestigious award honors the legacy of Professor Tasos C. Papanastasiou, a pioneer in Rheology, and recognizes outstanding contributions to the field. Rheology is the science of the deformation and flow of materials, both fluids (liquids and gases) and microsized granular (in powder form) solids. It is given to outstanding young scientists (no more than fifteen years of experience since completion of their PhD) engaged in rheological research and recognizes their achievements and contributions to the advancement of rheological science.

Professor Stephanou’s exceptional work in non-equilibrium thermodynamics and constitutive modeling has significantly advanced our understanding of complex fluids. His work, including the development of a simple, accurate, and user-friendly differential constitutive model for the rheology of entangled polymer melts and solutions, has had a profound impact on the field. In recognition of his achievements, he will deliver a keynote lecture “Non-equilibrium thermodynamics modeling of complex fluids: From polymer melts to cement pastes”.

The award will be presented for the first time at the 11th meeting of the Hellenic Society of Rheology (HSR) to be held on the island of Syros, June 11-14, 2025.
Assoc. Prof. Pavlos Stephanou PhD (b. 1982) graduated from the Department of Chemical Engineering, University of Patras, Patras, Greece in 2006 (GPA: 9.24/10). He then pursued postgraduate studies at the same Department under the guidance of Prof. Vlasis Mavrantzas. His PhD thesis is entitled “Development of scale-bridging methodologies and algorithms founded on the outcome of detailed atomistic simulations for the reliable prediction of the viscoelastic properties of polymer melts”. During his postgraduate career, he has worked at the University of Cyprus, the ETH Zürich (Switzerland), the Cyprus University of Technology, and Novamechanics Ltd (Cyprus) having received numerous research grants. He received the «Cyprus Research Award – Young Researcher 2015» by the Research and Promotion Foundation of Cyprus on November 23rd, 2015 (Thematic area: Physical Sciences and Engineering), for his research work entitled «Modelling the viscoelasticity of polymer-based nanocomposites guided by principles of non-equilibrium thermodynamics». He is, since September 2019, a faculty member (Associate Professor) at the Department of Chemical Engineering at the Cyprus University of Technology in Limassol, Cyprus. His research work connects three levels of system description, the atomistic or microscopic, the mesoscopic, and the macroscopic, through the development of scale-bridging methodologies using a) non-equilibrium thermodynamics to derive constitutive models for complex fluids, and b) simulation strategies for understanding the dynamics of polymeric and other complicated systems. Dr. Stephanou is the author or co-author of >40 journal publications