Author(s)

R.W. Barber & S. Bicknell

Abstract

This paper investigates the two-dimensional shallow recirculating flow patterns formed downstream of a backward-facing step. The characteristics of the wake region are examined through the use of particle tracking velocimetry and numerical simulation based upon a Lagrangian discrete vortex method. One of the main objectives of the present study is to show that the dissipative effects of bed friction can be simulated in discrete vortex models using a stochastic vortex lifetime procedure. 1 Introduction Shallow recirculating flow regimes occur frequently in nature. They can be observed in harbours and bays, behind islands, in reservoirs and downstream of civil engineering structures such as jetties and breakwaters. Theoretically, the compl

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