Article ID Journal Published Year Pages File Type
792466 Journal of Fluids and Structures 2011 9 Pages PDF
Abstract

Gravity currents are considered that propagate over a series of identical ribs with square cross sections. Both large-eddy simulations and a shallow-water approach are applied to assess the influence of rib height and Reynolds number. The simulations elucidate the physical mechanisms governing the time-dependent evolution of the drag force, which are dominated by the formation of a recirculation region immediately downstream of each rib, in conjunction with a supercritical, jet-like flow region above and behind the rib, and an upstream propagating hydraulic jump that forms as a result of the interaction between the gravity current and the neighboring rib immediately downstream. The corresponding shallow-water analysis yields fair agreement, indicating that simplified models can provide useful information for the present class of flows.

Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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