Flow over a backward step using Converge

In this project, flow of air over a backward facing step was simulated. The case was simulated for 2D condition. The inlet was given a boundary condition of 110325Pa and for outlet 101325Pa. The region was initialised with a pressure of 101325Pa. The k-epsilon turbelence model was used to capture turbulence.

Three cases with different base mesh sizes (2e-4, 2. 1.5e-4, and 1.2e-4) were simulated.

The mesh near the step can be seen in below images.

Resuts:

All three cases gave the same results. The velocity color map is shown below.

To understand if there is any backflow, the velocity glyph was plotted. It was seen that there were backflow near the step in all three cases.