The core strength of Flow-3D has always been its TruVOF algorithm, and in the Hydro version, this is refined for fixed mesh scenarios.
After extensive benchmarking and consultation with Flow Science certified engineers, the following workflow has emerged as the most reliable method to fix hydro cracks. Apply these steps in order. flow 3d hydro crack fixed
We dropped DTMAX from 1e-4 to 2e-5.
The crack appeared at high CFL numbers (>0.5). Keeping CFL below 0.3 eliminated 80% of occurrences. The core strength of Flow-3D has always been