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MixSim2: How to start a sliding-mesh (time-dependent) calculation on MRF (pseudo-stationary) results
The MixSim 2.0 User's Guide, section 11.4.5, gives wrong instructions.
Following them, one cannot establish a converging sliding-mesh simulation.
Correct instruction must (and will) be provided.
Running a sliding-mesh simulation in any FLUENT solver requires the non-conformal grid interfaces. Generating these is part of the meshing procedure. That means, in order to generate a mesh (and, from that, FLUENT case file) that is fit for a sliding-mesh calculation, you must....
- load (or generate) the MixSim model in a new MixSim session
- make sure that not "MRF" but "Sliding-Mesh" is selected in the "Model" object
- generate the mesh
- go to "Solver -- Iterate", click on "Iterate" and follow the instructions given.
In order to start the sliding-mesh simulation from the results of an MRF simulation, I'd suggest the following:
- First, run the MRF simulation from MixSim as if you never thought of sliding meshes. When you're done, export the results into an interpolation file (File -- Interpolate... in the FLUENT GUI).
- Then, setup the Sliding-Mesh simulation using MixSim. You can use the same MixSim model (.mxm) file: after reading it in a new MixSim session, you can change the selection in the "Model" object from "MRF" to "Sliding-Mesh" and re-generate the mesh (this is absolutely necessary!!!).
After you've gone through the complete set-up procedure (including "Solver -- Iterate: click on Iterate"), use the "File -- Interpolate" functionality of FLUENT (either in a stand-alone FLUENT session or in the FLUENT GUI of MixSim) in order to load the interpolation data that you saved from the MRF simulation. After that, start (continue) running the time-dependent simulation.