Drift velocity in sediment-laden downward jets

investigation of the velocity distribution in sediment-laden flow

introduction: for a velocity profile in turbulent flows, the flow conditions in the vicinity of the wall are described by logarithmic law of the wall. however, it has been extensively verified that the log-law does not apply in the outer region of the boundary layer. for example, in free surface flows, the law of the wall holds only for 20 percent of the flow depth from the wall. coles (1956) c...

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

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...

Sluicing Flumes for Gauging Sediment-Laden Rivers

The sluicing flume that was designed is less capable of silting up and losing its calibration than its counterparts of standard sharp-crested compound weir design. The laboratory work described here led to a refinement in the design in the form of a short flume set into the lowest section of a compound Crump weir gauging installation. Critical flow occurs near the exit of this flume, and it is ...