Effect of Grain Size Gradation and Reference Concentration on Sediment Transport beneath Large Waves

摘要

One-equation turbulent kinetic energy(k) numerical model is used to study the effect of graded sediment sizes on the distribution ofsuspended sediment concentration beneath large waves above a plane bed. 'Convective' suspended sediment concentration peaks at times of flow reversal observed in laboratory data are simulated by use of a newly-developed Two-equation(k-#epsilon#) model which includes a 'baseline' bed reference concentration in teh bottom boundary condition for the suspension layer.