Abstract: The motion of an air cavity, formed when a gate is opened at the lower end of a nearly horizontal, water‐filled square duct, is compared to a gravity current, formed by the interaction of two liquids of differing density. ...

Abstract: Quasi‐two‐dimensional turbulence was investigated experimentally in an apparatus consisting of two closely spaced vertical parallel walls. A jet of salt water was injected downward between the walls. Entrainment of fluid ...

Abstract: A new mechanism of physiological lubrication is proposed to explain how low-viscosity synovial fluid prevents articular surfaces from contacting and wearing. The new mechanism is based on the ...