Week 8 - Simulation of a backward facing step in OpenFOAM

The geometry was created and vertices were added in such a way that grading is possible on all walls, and at the interface. The image is attached with the solution.

For this case we have used incompressible > icofoam > cavity example problem. This is because we want a laminar transient solver.

Two cases were made one with no grading and uniform mesh and the other with grading at the edges as can be seen in the attached images.

IcoFoma simulation was run for 5 seconds to ensure that we reach steady state. The velocity profile does not change after 5 seconds. So we can be certain that it has reacher steady state.

A line was drawn at 0.85 m from the inlet to compare the velocity profiles. The changes are minor. But mesh grading at the edges is useful to view the bounday layer effects