Experimental and large eddy simulation study of the flow developed by a sequence of lateral obstaclesReportar como inadecuado




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In this paper we provide a description of the three-dimensional flow induced bya sequence of lateral obstacles in a straight shallow open-channel flow with flat bathymetry.The obstacles are modelled as rectangular blocks and are located at one channel wall,perpendicular to the main stream direction. Two aspect ratios of the resulting dead zonesare analysed. The flow structure is experimentally characterised by particle image velocimetrymeasurements in a laboratory flume and simulated using three-dimensional Large EddySimulations. Good agreement between experimental measurements and numerical results isobtained. The results show that the effect of the obstacles in the main channel is observedup to one obstacle length in the spanwise direction. The spacing between obstacles doesnot seem to have a large influence in the outer flow. The mean flow within the dead zone ischaracterised by a large recirculation region and several additional vortex systems. They arediscussed in the paper, as well as the mean and root-mean-square wall shear-stresses.Nota general

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Autor: Brevis, W.; - García Villalba, M.; - Niño Campos, Yarko Iván; -

Fuente: http://repositorio.uchile.cl/



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