| Citation | Distinguished for pioneering researches in mathematics applied to biofluiddynamics. After innovative non-linear flow-network studies of lung inspiration and forced expiration, he extensively investigated The Fluid Mechanics of Large Blood Vessels (title of his distinguished monograph); highlights being (i) his performance analysis for hot-film velocimeters in blood flows including reversing phases, (ii) fluiddynamics of veins and other collapsible tubes capable of flow-excited oscillations and/or novel unsteady separation phenomena, (iii) demonstration of "vorticity waves" in pulsatile-tube flows. In later ecological studies, he uncovered "gyrotaxis" (response to local vorticity by microorganisms with non-centroidal mass-centres) as the principal mechanism (rather than "geotaxis") underlying bioconvective motions in assemblages of microorganisms. |