DyDomain - Particles

The Dyverso domain holds the particles, while the emitter nodes represent the point of emission.

Type

There are two different fluid types. Both types share the same parameter set, although the output is different:

• "Dumb” particles are often used for spray or foam. These particles cannot react with each other, but they are simulated very fast.
• "Liquid - SPH" is similar to the technology behind RealFlow's → standard particle fluids, but faster and provides GPU support.
• "Liquid - PBD" is a very fast solver with GPU support.

Resolution

With this setting you can change the amount of particles, “Resolution” mainly depends on scene scale and emitter scale, but it also affects the fluid’s mass and therefore depends on “Density”, too:

• With “Resolution” set to 1.0, a volume of 1 m x 1 m x 1 m filled with 1,000 particles.
• The parameter accepts any positive value.

Density

This parameter is defined as mass per volume unit and is different for each substance. “Density” does not change the fluid's behaviour, but it is possible to mix fluids from different domains. This way you are able to simulate substances like oil and water. The unit is kilograms per cubic metre. The density of water is 1,000 kg/m³. Avoid very small values close to 0, because they can lead to instabilities.

Int Pressure

“Int Pressure” simulates the forces between nearby particles and pushes them apart - this makes the fluid fill a greater volume.

Ext Pressure

“Ext Pressure tries to limit a fluid’s expansion tendency and can be compared to atmospheric pressure.

Viscosity

Substances with very high viscosity are honey, tar or syrup, for example. Fluids with low viscosity are alcohol, many solvents or liquid gases. The default value of 3.0 describes the viscosity of water. You can enter any positive value.

Surface tension

A fluid's tendency to contract and create drops and tendrils is increased with higher settings. You can enter any positive value.