| Field | Description |
|---|---|
| Linear Viscosity Coefficient | Recommended value between 1.0 (default) and 2.5. Lower values produce good results for low impact velocities. However, post shock oscillations may not be completely removed at higher impact velocities (>1000 m/s). The larger value of 2.5 reduces post shock oscillations at higher velocities but can result in large diffusion of the shock front at lower velocities. This field is not available for LS-DYNA. |
| Quadratic Viscocity Coefficient | Recommended value between 1.0 (default) and 2.5. The larger value of 2.5 can result in large diffusion of the shock front. Also, higher values result in smaller stability timesteps and hence longer computation times. This field is not available for LS-DYNA. |
For more information about LS-DYNA SPH analysis settings, see *CONTROL_SPH in the LS-DYNA User's Guide.