How to specify an initial Mesh Deformation at t=0?

Original mesh is ready. Start a new run (with or without mesh deformation), for which some boundary is already shifted at t=0 with a delta_X, for example.
We need then to shift the boundary from the original mesh "before" starting the run.


In order to get an initial mesh deformation at t=0, a first case must be run in advance where the desired mesh deformation will be achieved, and then use this to set-up the final case. This can be easily done by the following process:

1. Setting-up a dummy simulation in CFX-Pre with the original mesh. It must be transient (1 time step is enough) in order to allow for Mesh Deformation. A Wall B.C. with mesh motion must be defined, so that the required deformation is specified. Expert parameters can be set to allow for mesh deformation calculation only (solve fluids = f, etc.)

2. By reading the previous results file in CFX-Pre, the mesh with the specified displacement will be obtained. Then the setup for the final simulation can be done.





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