Third Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP3
3-D NUMERICAL SIMULATION OF TURBULENT STRUCTURE IN TIME-DEPENDENT AND DEPTH-VARYING UNSTEADY COMPOUND OPEN CHANNEL FLOWS
pages 875-880
DOI: 10.1615/TSFP3.1460
SINOPSIS
There are a lot of previous studies on compound open-channel flows, because such a two-stage flow with a lower main-channel and floodplains is one of the most important flows for water disaster prevention, valuable open-spaces of aquatic lives and river ecosystems. However, there are quite few studies on three-dimensional (3-D) structures in depth-varying unsteady compound open-channel flows. In this study, a 3-D time-dependent numerical model is developed and applied to such unsteady depth-varying compound free-surface flows. The calculated results are compared with the reliable experimental database of LDA, and the unsteadiness properties of mean velocity and turbulence structures are discussed in detail.