Objects - Volume

The settings of this panel affect the interaction between objects and → HyFLIP fluids, → HySPH secondary elements, and → Dyverso fluids.

Cell size

When objects are used in Hybrido simulation they are turned into a grid made of cells. With a value of 0.3, the smallest volume element of the domain is 0.3 m x 0.3 x 0.3 m. The more cells, the more details you will get, but at the cost of longer simulation times.

Please visit these pages to learn more:

• → HyFLIP - Cell Size
• → HyFLIP - Fluid-Object Interaction
• → Dyverso - Fluid-Object Interaction

Surface offset

This parameter creates a solid extension (in metres) around the object and prevents the fluid from penetrating its surface:

• The offset can be visualized with Node Params > Display Volume > Isosurface.
• Both positive and negative values are accepted.
• Please read → “HyFLIP - Fluid-Object Interaction” and "Dyverso - Fluid-Object Interaction" for more information.

Domain offset

In order to improve fluid-object interaction you can increase this parameter. The effect is that the fluid will “see” the object earlier. This can be interesting for fast-moving fluids.

Volume mode

Here are the three possible modes:

• "Solid inside" makes the fluid collide with object's outer surface.
• "Solid outside" creates a hollow object and fluid interacts with the inner surface.
• "Shell" is often used with open objects like glasses, vases, or RealFlow's "Cube top open" node. When active, RealFlow adds an invisible layer around the object's surface. The thickness of this layer is Cell size * 3. As a consequence, there will always be a gap between the fluid and the object, but it is watertight.