Author(s): Bijoy S. Mazumder; Dibyendu K. Pal; Koeli Ghoshal; Satya P. Ojha

Linked Author(s):

Keywords: ADV; Bedforms; Burst-sweep cycle; Flow separation; Recirculation; Reynolds stress; Turbulence

Abstract: The objective of this research is to examine the turbulent flow characteristics over artificial waveform structures and to compare turbulence between two types of isolated geometries. Measurement of turbulent velocity components have been performed over the respective structures of equal crest height and length at the Fluvial Mechanics Laboratory (FML) of the Indian Statistical Institute, Calcutta. The velocity data were analyzed to determine the relative importance of mean flows, Reynolds stresses and the contributions of burst-sweep cycles. The difference in the sizes of the separation zone for these two cases makes significant differences in the mean flow and turbulence. The motivation of this study is to identify the spatial changes of flow and turbulent events over these structures, and to gain better insight in the flow physics, which are different conditions for the process of sediment transport.

DOI: https://doi.org/10.3826/jhr.2009.3397

Year: 2009