MODULATION OF TURBULENT STRUCTURE AND LOCAL SEDIMENT CONCENTRATION IN SEDIMENT-LADEN OPEN-CHANNEL FLOW

Entropy-Based Modeling of Velocity Lag in Sediment-Laden Open Channel Turbulent Flow

Manotosh Kumbhakar 1,*, Snehasis Kundu 2, Koeli Ghoshal 1 and Vijay P. Singh 3,4 1 Department of Mathematics, Indian Institute of Technology, Kharagpur 721302, India; [email protected] 2 Department of Basic Sciences and Humanities, IIIT Bhubaneswar, Odisha 751003, India; [email protected] 3 Department of Biological & Agricultural Engineering, Texas A&M University, College Statio...

Analysis of Velocity Lag in Sediment-laden Open Channel Flows

Laboratory experiments have recently confirmed that the streamwise particle velocity is largely less than that of the fluid in sediment-laden flows. This velocity lag is investigated analytically in the present study based on the drag force exerting on a particle in the presence of other neighbors. The normalized drag force or the hindrance coefficient is found generally dependent on the partic...

Hydraulic roughness in sediment-laden flow

Turbulent Shear Stress in Heterogeneous Sediment-laden Flows

Current knowledge of the mechanics of alluvial channels depends very largely on calculations of turbulent shear stresses; typical examples are the beginning of motion of sediment particles and sediment transport in alluvial channels. If shear stress can be well defined in clear-water flows, comparatively little is known about shear stresses in sediment-laden flows. Einstein and Chien (1955) pro...

Direct Numerical Simulation of Sediment Transport in Turbulent Open Channel Flow

Direct numerical simulations of interface-resolved sediment transport in horizontal open-channel flow are currently being performed on the XC-4000. The channel bottom boundary is roughened with a fixed layer of spheres and about 9000 particles are allowed to move within the computational domain. The density ratio of the solid and fluid phase is 1.7 and the bulk Reynolds number of the flow is 28...