Author(s): T. Tsujimoto; H. Gotoh; A. H. Nakagaw
Linked Author(s):
Keywords: No Keywords
Abstract: Vanoni (1946) pointed that in the sediment laden flow the energy to keep sediment in suspension was supplied from the mean flow to turbulence and then the velocity gradient increased with the sediment concentration. This fact had been regarded as a "decrease of Karman constant" against the sediment concentration. Einstein & Chien(1958) proposed a unique relation between the change of the Karman's constant and the ratio of the energy to keep the sediment suspension. Karim & Kennedy(1983) obtained a formula through a regression analysis of a large number of data from rivers and laboratory flumes. Hino (1963), Itakura & Kishi (1980) and others investigated the turbulent structure of sediment laden flow theoretically based on the equation for the equilibrium of turbulent energy, and the effect of suspended sediment transport on the velocity profile was evaluated not directly but indirectly through empirically guessed hypotheses in their studies.
Year: 1995