The proplem was solved by modifying the under- relaxation factor as follow:
| Under-relaxarion factor | case | Default |
| Pressure | 0.2 | 0.3 |
| Density | 0.3 | 1 |
| Body forces | 0.3 | 1 |
| Momentum | 0.3 | 0.7 |
| Volume fraction | 0.3 | 0.5 |
| Granular Temperature | 0.1 | 0.2 |
| Energy | 0.3 | 1 |
Do you think these modification could effects the results accuracy , If so what else I can do?
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