Author(s): Joongcheol Paik; Cristian Escauriaza; Fotis Sotiropoulos
Linked Author(s): Joongcheol Paik
Keywords: No Keywords
Abstract: This paper presents recent progress toward the development of coherentstructure-resolving computational fluid dynamics techniques for simulating flows in complex open-channel flows and at real-life Reynolds numbers. The simulations have shed new insights into the rich, large-scale instabilities of the turbulent horseshoe vortex (THSV) in flows past bed-mounted piers. Such simulations have demonstrated that the Reynolds number is an important parameter governing the coherent dynamics of the THSV. Computational results elucidate the dynamics of high Reynolds number flows past surface-piercing, groyne-like structures mounted on the side of open channels. The simulations reveal the complexity of the recirculating region at the upstream face of the groyne, underscore the interaction of the flow in this region with the energetic shear layer shed from the corner of the structure, and demonstrate the importance of flow depth in the vorticity dynamics of such flows.
Year: 2009