I then spent 5 years as a post-doctoral research assistant in the Department of Engineering Science at Oxford, being awarded a research lectureship (modern Junior Research Fellowship) at Christ Church in 1979.
In 1981 I went to Bristol University as a lecturer in Applied Mathematics, gaining tenure in 1984.
I joined Schlumberger Cambridge Research in October 1984 as a research scientist, and became project leader at the end of 1985.
In 1987 I returned to Oxford as a University Lecturer in the Computing Laboratory and a Tutorial Fellow in Engineering at St John's College. Around the early 2000s the Numerical Analyis group moved to the Mathematical Institute and i have been a member of that University department up to my retirement in 2016.
Trained as an applied mathematician I have spent much of my research career using computational fluid mechanics and flow visualisation to study the nature of unsteady separation and its application to laminar mixing processes, particularly those those of importance in medical engineering. The bulk of my work has been published in the Journal of Fluid Mechanics. My experience is very broad, encompassing teaching and research in both theoretical and engineering departments and research and management in industry.
My research interests have been concerned mainly with unsteady fluid dynamics and the application of such flows to mixing, filtration and heat transfer problems. The techniques I used to study these problems were analytic, numerical and experimental, much of my experimental work being carried out in the Medical Engineering Unit at Oxford. Since much insight into fluid dynamcs is derived from computed solutions many of my current interests centred around numerical analysis but fluid mechanics, and particulalry medical applications of fluid mechanics, remained the primary focus of my research.
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