Prof. Vassilios Theofilis


University of Liverpool

Chair in Aerospace Engineering

Mechanical, Materials & Aerospace Eng.



CeFPaC Experience: 

Dr. Theofilis’ research interests lie in the prediction and control of fluid flow instabilities at all speed regimes. In particular, he specialises in the areas of global linear and nonlinear instability of flows with multiple inhomogeneous spatial directions and the associated numerical solution of large eigenvalue and initial-value problems governing small-amplitude disturbances in such flows. Applications of current interest include attached and separated boundary layer flows, vortex systems in the wake of three-dimensional wings, flow over aircraft fuselages and submarines, supersonic flow over compression ramps and hypersonic flows over elliptic cone and double-cone geometries, including instability analysis of shock-wave / boundary-layer interaction and hypersonic laminar-turbulent transition.

Awards & Honors: 
  • Personal Distinctions

  • 61st Ludwig Prandtl Memorial Lecture (Keynote Speech, GAMM - Gesellschaft für angewandte Mathematik und Mechanik / DGLR - Deutsche Gesellschaft für Luft und Raumfahrt, TU München, Germany, March 19, 2018 2018)

  • Global linear stability theory in aerospace applications (Invitation to Speak, 13th ERCOFTAC - Special Interest Group 33 Workshop Progress in Transition Modeling and Control, Paraty, Brazil, March 6-8, 2018 2018)

  • An overview of global stability analysis highlights, a closure and new frontiers (Invitation to Speak, 70th Annual Meeting of the American Physical Society, Denver, Colorado, USA, November 19-21, 2017 2017)

  • Global linear stability analysis past the solution of multi-dimensional EVP and SVD problems" (Invitation to Speak, AIAA Modal Decomposition Methods for Aerodynamic Flows (Invited Session), June 14, 2016, Washington DC, USA 2016)

  • Global Linear Instability (Keynote Speech, 8th IUTAM Laminar Turbulent Transition Symposium, 8 – 12 September 2014, Rio de Janeiro, Brasil 2014)

  • Global Linear Instability: Theory and Implementation (Invitation to Speak, VKI Lecture Series "Progress in Flow Instability Analysis and Laminar-Turbulent Transition Modeling", Brussels, Belgium 2014)

  • Global Linear Instability: Applications (Invitation to Speak, VKI Lecture Series "Progress in Flow Instability Analysis and Laminar-Turbulent Transition Modeling", Brussels, Belgium 2014)

  • Global Linear Instability at the Dawn of its 4th Decade: A List of Challenges (Keynote Speech, 6th AIAA Theoretical Fluid Mechanics Conference, 27 - 30 June 2011, Honolulu, Hawaii, USA 2011)

  • Ramón y Cajal Research Fellowship (Competitive Fellowship, Ministry of Science and Education, Spain 2002)

  • Alexander von Humboldt Research Fellowship, DLR Göttingen (Competitive Fellowship, Alexander von Humboldt Foundation, Germany 1996)

Selected Publications: 
  • The linearized pressure Poisson equation for global instability analysis of incompressible flows

  • (Journal article - 2017)

  • Modal Analysis of Fluid Flows: An Overview

  • (Journal article - 2017)

  • Modal Stability Theory (Journal article - 2014)

  • Global Linear Instability (Journal article - 2011)

  • On the origins of unsteadiness and three-dimensionality in a laminar separation bubble (Journal article - 2000)