Research interests lie in finite element methods applied to problems of:

  • Solidification, flow and thermal stress in castings.
  • Natural and artificial ground freezing. Heat and mass transfer in porous capillary bodies.
  • Consolidation and flow through porous media.
  • Multiphase flow in petroleum reservoirs.
  • Flow and Compaction of pharmaceutical powders.


  1. Lewis, R., Gethin, D., Yang, X., Rowe, R. A combined finite-discrete element method for simulating pharmaceutical powder tableting International Journal for Numerical Methods in Engineering 62 7 853
  2. Gethin, D., Yang, X., Lewis, R., Lewis, R. A two dimensional combined discrete and finite element scheme for simulating the flow and compaction of systems comprising irregular particulates Computer Methods in Applied Mechanics and Engineering 195 41-43 5552
  3. Lewis, R., Makurat, A., Pao, W. Fully coupled modeling of seabed subsidence and reservoir compaction of North Sea oil fields Hydrogeology Journal 11 1 142
  4. Lewis, R., Postek, E., Han, Z., Gethin, D. A finite element model of the squeeze casting process International Journal of Numerical Methods for Heat & Fluid Flow 16 5 539

External Responsibilities

  • I am the Editor-in-Chief of the International Journal of Numerical Methods in Heat and Fluid Flow
  • I am a Fellow of the Royal Academy of Engineering (FREng) and also of the Learned Society of Wales (FLSW)