Author(s)

R.W. Barber

Abstract

A two-dimensional random vortex model has been established to simulate the eddy formation downstream of a backward-facing step. The numerical model uses the Lagrangian-Eulerian (cloud-in-cell) approach to calculate the motion of the individual discrete point vortices. One of the main objectives of the present study is to show that the dissipative effects of bed friction can be taken into account by reducing the circulation of the elemental vortices using a stochastic vortex lifetime procedure. 1 Introduction Shallow recirculating flow regimes occur frequently in nature. They can be observed in harbours, behind islands, in reservoirs and downstream of civil engineering structures such as jetties and breakwaters. Theoretically, the complex fluid motion

Keywords