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With DT beeing the timestep in seconds and DX the average grid size in meters one can now calculate Vspng_coeftop with:
| Volet |
|---|
| Vspng_coeftop = 0.8 / DT * (DX**2) |
Vspng_nk should not get set to a value smaller than 6, so:
| Volet |
|---|
| Vspng_nk = 6 |
Comments from Bernard:
Voici le commentaire qu'on trouve dans vspng_main :
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