This window lets you set solution options for 3D SPH Parts. The default settings are the recommended settings.

**Quadratic viscosity**The coefficient of quadratic viscosity you want to use for SPH computations.

**Linear viscosity**The coefficient of linear viscosity you want to use for SPH computations.

**Smoothing Length**Specify whether you want to use a

**constant**or**variable**smoothing length. Using a variable smoothing length is not recommended for most calculations.**Interface treatment**Specify if you want to use

**Impact/Separation**calculations for the treatment of interfaces between different SPH regions.**Work Unit Options****Work Unit Size**The work unit size (as a multiple of the smoothing length) you want to use for SPH calculations. The value you enter here can significantly affect the efficiency of SPH calculations.

**Buffer Zone Size**The buffer zone size (as a multiple of the smoothing length) you want to use for SPH calculations. The value you enter here can significantly affect the efficiency of SPH calculations.

**Note:** The current implementation of the Smooth Particle Hydrodynamics
solver has the following limitation for Rigid Body Rotations:

The conservation of angular momentum can not always be guaranteed.