I am interested in the mathematical modelling of fluid mechanical, industrial and medical problems. Active research areas include Photovoltaic devices, Surfactant systems, Tear films, Industrial mathematics and Mathematical modelling in medicine and biology. 
Tear films
We have had a fresh look at the old problem of the adsorption of ionic surfactant at an airliquid interface. Standard drift/diffusion models predict too high a concentration of counter ions just below the surface, and several fudges exist to counter this. We have postulated a new model, where surfactant ions recombine in the bulk as well as near the surface, which negates the need for a fudge. 
We extended this model to include the flow of nonpolar lipids over the
eye surface. One current goal is to couple evaporation from the eye
surface to the thickness of the nonpolar lipid layer. Related publications: The effect of polar lipids on tear film dynamics.
