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“Int Pressure” simulates the forces between nearby particles and pushes them apart - this makes the fluid fill a greater volume. This parameter has no effect on "Dumb" particles.
Ext Pressure
“Ext Pressure tries to limit a fluid’s expansion tendency and can be compared to atmospheric pressure. This parameter has no effect on "Dumb" particles.
Viscosity
Substances with very high viscosity are honey, tar or syrup, for example. Fluids with low viscosity are alcohol, many solvents or liquid gases. You can enter any positive value:
- The default value of 3.0 describes the viscosity of water.
- If the fluid does not behave correctly with higher settings (around 50+) you should consider increasing substeps under Scene > Solver.
- Equal values for "MIN | MAX Substeps" produce the best results with highly viscous fluids. Try Liquid - PBD 20 | 20 or Liquid - SPH 200 | 200
This parameter has no effect on "Dumb" particles.
Surface tension
A fluid's tendency to contract and create drops and tendrils is increased with higher settings. You can enter any value between 0 and 10. This parameter has no effect on "Dumb" particles.