Setting Boundary Conditions and Values

This problem requires only two boundary conditions: moving and stationary. In Simcenter STAR-CCM+, it is possible to combine two or more boundaries into one.

Use the following steps:
  1. Open the Regions > cell-2 > Boundaries node.
  2. Multi-select the boundary nodes wall-3, wall-4, and wall-7.

  3. Right-click and select Combine.
    This creates a single boundary, wall-3, that consists of all sides of the square except the top.
  4. Rename the wall-3 node to Stationary Wall.
  5. Rename the wall-5 node to Moving Wall.

For the moving wall boundary, set the velocity of 1 m/s in the x-direction:

  1. Select the Moving Wall > Physics Conditions > Tangential Velocity Specification node and set the Method to be Vector.
  2. Select the Physics Values > Relative Velocity node and enter 1,0,0 in the Value property.
  3. Save the simulation.