Numerical modelling of backward-facing step flow

The contribution deals with a 3D numerical simulation of backward-facing step flow. The ratio of width to height of the channel before the expansion is 10:1, the height of the step is equal to the upstream channel height (expansion ratio is 2). Both the turbulent and the laminar flow regimes are simulated. The results will be used as a basis for experimental research, which will be focused on a mutual comparison of experimental methods – mainly LDA and PIV