HySPH - Particles (Liquid - Particles)

"Liquid - Particles” particles can be used to create very realistic and convincing splashes, especially when you want to combine core fluid particles and splashes within a single mesh. One of the main attributes of this particle type is “Viscosity” that can be used to simulate different types of fluid. When you switch to “Liquid” you will most probably get much fewer particles than with “Dumb”. In this case you should increase the emitter’s “Emission rate” parameter. Please also bear in mind that simulations with “Liquid” particles take much longer and you should consider using IDOCs with this particle type. A very good alternative to "Liquid - Hybrido" and "Dumb" is the "Liquid - Hybrido" type.

Type

If you do not want to use the “Dumb” type you can also switch to “Liquid - Particles” or "Liquid - Hybrido". Simulations with "Liquid - Particles" take much longer, but they also create very realistic results, especially for mid-scale simulations. Other types, like “Elastics” or “Gas” are not available with HySPH emitters. With "Liquid - Hybrido" the particles will be controlled by RealFlow's Hybrido solver.

Density

A fluid's “Density” value does not influence the simulation and you can use any value. This changes when there is more than one particle fluid source and you want to achieve a certain effect, for example fluids that cannot mix, like water and alcohol. The parameter's unit is kilograms per cubic metre [kg/m³].

Viscosity

This parameter is also called inner friction and describes the friction between the particles. Higher settings can be used to simulate substances or fluids like honey or caramel. Please note that high values can strongly accelerate the particles and lead to instabilities, but they can also help to keep the particles together and avoid exaggerated splashes.

Surface tension

Here you can define a fluid's tendency to form drops. For a better distribution of the fluid's surface tension we recommend using the correspondent daemon: its “Balanced” option creates better results.

Max particles

This parameter provides a very convenient method of controlling the number of particles, although it is rarely used. When the total number of emitted particles exceeds this value, the emitter will not be able to create more particles and emission stops.