Heng Wu

Okinawa Institute of Science and Technology | OIST · Marine Biophysics Unit

Feeding by zooplanktivorous fish depends on their foraging movements and the flux of prey to which they are exposed. While prey flux is a linear function of zooplankton density and flow speed, those two factors are expected to contribute differently to fish movements. Our objective was to determine effects of these factors for garden eels, stationa...

Systematic experiments were conducted to study differences in the threshold flow conditions for initiation of motion of submerged objects (spheres and cylinders) resting on permeable and impermeable beds. The threshold flow conditions were characterized with the Shields parameter, which was estimated with upstream flow velocity measurements obtaine...

Abandoned Unexploded Ordnances (UXOs) from wartime events, accidents, training or other military activities can be found in coastal environments. While the interest for these hazardous submerged objects is increased, there are still existing knowledge gaps regarding the mechanisms of incipient motion and flow behavior around UXOs lying on the seafl...

The experimental study of incipient motion, the regime where particles resting on a granular bed enter a process of sediment transport, can be approached using a single-particle pivoting model. Such pivoting model states that the fundamental mechanism of the incipient motion depends, among other factors, on the local fluid flow, bed-flow interface...

Flows over permeable walls are ubiquitous in nature, with hyporheic flow playing a key role in subsurface-surface exchange, particulate dispersal and accumulation and the ecology of the top few pore spaces of a sediment bed. The study of flow dynamics in hyporheic flow is relevant to improve our understanding of the transport processes crucial for...