Wolfson Building, Parks Road, Oxford OX1 3QD
My main research interest is in laminar fluid mechanics, particularly unsteady flows which separate and form vortices. The main use I have made of unsteady laminar flows has been in devices which handle blood (since blood cannot be subjected to over-vigorous mixing). Over time I have been involved with design of artificial oxygenators, dialysers and blood filters. A central feature of separated flow is the non-linear interaction between vorticity and velocity and this is so difficult to deal with analytically that the two main techniques we have to study unsteady separation are observation of real fluids and computation of solutions to the Navier-Stokes equations. I have used both these techniques but it is particularly the latter which has dominated my research work. My current main interests are:
- Mathematical Medicine - the movement of cerebrospinal fluid through the brain
- Vortex Waves - prediction of fast transients in steady and unsteady channel flow
- Mixing Devices - adaptation of unsteady flows for mass transfer
BiographyMy first degree was in Applied Mathematics at Adelaide University and my Ph.D. was on fluid mechanics in the Department of Applied Mathematics and Theoretical Physics at Cambridge. 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. 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.
Linear instability of asymmetric Poiseuille flows
Dick Kachuma and Ian Sobey
No. NA-07/21. Oxford University Computing Laboratory. November, 2007.