Volume 250 May 1993 CONTENTS A direct numerical simulation of laminar and turbulent flow over riblet- mounted surfaces. Douauas C. Cou and GEORGE Em KARNIADAKIS The structure of a three-dimensional turbulent boundary layer. A. T. Drgant, F. T. Surra and J. D. A. WALKER Measurements of the primary instabilities of film flows. Jun Liu, JONATHAN D. Pavt and J. P. GOLLUB Excitation of capillary waves by longer waves. KENNETH M. WarTSsoN and Joun B. McBRIDE The mean drift force and yaw moment on marine structures in waves and current. JoHN GRuE and ENoxk PaLm Microstructure suspended in three-dimensional flows. ANDREW J. SzERI and L. GaRY LEAL A mechanism for bypass transition from localized disturbances in wall- bounded shear flows. Dan S. HENNINGSON, ANDERS LUNDBLADH and ARNE V. JOHANSSON Convection in a rotating spherical fluid shell with an inhomogeneous tem- perature boundary condition at infinite Prandtl number. KEKE ZHANG and Davip GUBBINS Buoyancy effects in stably stratified horizontal boundary-layer flow. P. G. DanIELs and R. J. GARGARO Oscillatory instabilities produced by heat from a temperature-controlled hot wire below an interface. C. Rozk, G. GouEsBET and R. DarRico Mixing by a turbulent plume in a confined stratified region. Sttvana S. 8. Carposo and ANDREW W. Woops Dynamic simulations of flows of bubbly liquids at large Reynolds numbers. A. 8. Saneani and A. K. Dipwanta Particle-driven gravity currents. Roger T. Bonnecaze, HErRBert E. Huppert and Joun R. LIsTER The eddy structure in Stokes flow in a cavity. P. N. SHANKAR Surface motion induced by the interaction of pulsed laser radiation with highly absorbing dielectric fluids. Konstantin A. NAUGOL’NYKH, OLEG V. PucHENKOV, Victor V. Zostmov and ALEXANDER E. PASHIN Stratified Sadovskii flow in a channel. S. CHERNYSHENKO Nonlinear evolution of waves on a vertically falling film. H.-C. Cane, E. A. DEMEKHIN and D. I. KopELEvIcH Vortex-induced vibrations of a long flexible circular cylinder. D. Brika and A. LANEVILLE Volume 250 May 1993 CONTENTS A direct numerical simulation of laminar and turbulent flow over riblet- mounted surfaces. Douauas C. Cou and GEORGE Em KARNIADAKIS The structure of a three-dimensional turbulent boundary layer. A. T. Drgant, F. T. Surra and J. D. A. WALKER Measurements of the primary instabilities of film flows. Jun Liu, JONATHAN D. Pavt and J. P. GOLLUB Excitation of capillary waves by longer waves. KENNETH M. WarTSsoN and Joun B. McBRIDE The mean drift force and yaw moment on marine structures in waves and current. JoHN GRuE and ENoxk PaLm Microstructure suspended in three-dimensional flows. ANDREW J. SzERI and L. GaRY LEAL A mechanism for bypass transition from localized disturbances in wall- bounded shear flows. Dan S. HENNINGSON, ANDERS LUNDBLADH and ARNE V. JOHANSSON Convection in a rotating spherical fluid shell with an inhomogeneous tem- perature boundary condition at infinite Prandtl number. KEKE ZHANG and Davip GUBBINS Buoyancy effects in stably stratified horizontal boundary-layer flow. P. G. DanIELs and R. J. GARGARO Oscillatory instabilities produced by heat from a temperature-controlled hot wire below an interface. C. Rozk, G. GouEsBET and R. DarRico Mixing by a turbulent plume in a confined stratified region. Sttvana S. 8. Carposo and ANDREW W. Woops Dynamic simulations of flows of bubbly liquids at large Reynolds numbers. A. 8. Saneani and A. K. Dipwanta Particle-driven gravity currents. Roger T. Bonnecaze, HErRBert E. Huppert and Joun R. LIsTER The eddy structure in Stokes flow in a cavity. P. N. SHANKAR Surface motion induced by the interaction of pulsed laser radiation with highly absorbing dielectric fluids. Konstantin A. NAUGOL’NYKH, OLEG V. PucHENKOV, Victor V. Zostmov and ALEXANDER E. PASHIN Stratified Sadovskii flow in a channel. S. CHERNYSHENKO Nonlinear evolution of waves on a vertically falling film. H.-C. Cane, E. A. DEMEKHIN and D. I. KopELEvIcH Vortex-induced vibrations of a long flexible circular cylinder. D. Brika and A. LANEVILLE Contents Low Reynolds number k-e modelling with the aid of direct simulation data. W. Ropi and N. N. Mansour Temperature dissipation in a turbulent round jet. R. A.A NTonta and J. MI Barotropic flow over finite isolated topography : steady solutions on the beta- plane and the initial value problem. Luannr THompson and GLENN R. FLIERL Experimental studies of the deformation of a synthetic capsule in extensional flow. K. 8. Coane and W. L. OLBRICHT Experimental studies of the deformation and breakup of a synthetic capsule in steady and unsteady simple shear flow. K.S.CHane and W. L. OLBRICHT Dynamics of liquid jets revisited. R. M. 8. M. ScHULKES Momentum and heat transport in the turbulent intermediate wake of a circular cylinder. M. Matsumura and R. A. ANTONIA The propagation of intrusion fronts of high density ratios. H. P. Gr6BEL- BAUER, T. K. FANNELOP and R. E. BrRITTER REVIEWS Bifurcations in Flow Patterns, by P. G. Bakker ; Nonlinear Systems, by P. G. Drazin SHORTER NOTICES INDEX TO VOLUME 250 SCHEDULE OF INTERNATIONAL CONFERENCES ON FLUID MECHANICS