| Citation | Distinguished for his contributions to theoretical fluid mechanics in several major fields: (i) the calculation of viscous flows, including those associated with constricted, indented, curved or branching pipes; (ii) the theory of boundary-layer separation and re-attachment in the aerodynamics of bodies; (iii) the treatment of finite-amplitude wavy perturbations and critical layers in growing boundary-layer and shear flows, and in pipes and channels, as a precursor to turbulence; (iv) inviscid aerodynamics of trailing-edge and wake flows, and of transonic flow.
His work is characterized by a penetrating insight into the nonlinear asymptotic and computational analyses of the equations of fluid flow, with a deep appreciation of their relevance to observation. |