HyFLIP - Domain

Owned by thomas (Unlicensed)
Last updated: 27 Jul, 2015
2 min read

The Hybrido domain is the place where the simulation happens, it provides the physics to move the fluid and carries the particles that represent the fluid's body. The particles

  • are considered to be mass-less and carry the fluid's velocity
  • hold important information that is used to create splashes and foam, as well as the Hybrido mesh
  • can be affected by various daemons.

RealFlow's Hybrido domain is represented as a square with four boxes in the corners – the so-called projection plane:

  1. The boxes' size directly corresponds with the → “Cell size” parameter in the → “Grid” section under "Node Params". 
  2. The square represents the projection plane for the → displacement feature and the image export options, e.g. for vorticity textures.
  3. During simulation, the projection plane can be positioned anywhere, because it does not have any influence on where the fluid is finally created – this depends on the → emitter's position.
  4. If you want to bake the displacement to a → Hybrido mesh the plane plays an important role

In order to create smaller surface waves and ripples, an additional layer can be added: the → ocean statistical spectrum, also known as displacement.

Open and Closed Domains

Open domains are not restricted and the fluid particles are free to move. When you choose “Closed Domain” RealFlow will add a couple of nodes to create a complete setup with a domain, an emitter including an attached emission object, and a container to enclose the fluid. Another element is a null object, named “HY_Closed_Domain_Manipulator”:

  • Instead of rescaling the container, the domain's projection plane, and the emitter object one by one individually, you just rescale the manipulator object and all nodes, listed before, will be modified at once.
  • Before the scene elements are created you can define their basic parameters.




Dimension

Specify the domain's X, Y, and Z dimensions in metres-

Type

Choose, whether you want to create a completely closed container, or a top-open object.

Water level

Enter the desired water depth in metres. This parameter will affect the emission object.