Fluid Obstacle¶
Reference
| Panel: | |
|---|---|
| Type: | Obstacle |
This object will be used as an obstacle in the simulation. As with a fluid object, obstacle objects currently should not intersect. As for fluid objects, the actual mesh geometry is used for obstacles. For objects with a volume, make sure that the normals of the obstacle are calculated correctly, and radiating properly (use the in mesh edit mode), particularly when using a spinned container. Applying a Subdivision Surface Modifier before baking the simulation could also be a good idea if the mesh is not animated.
Options¶
- Volume Initialization Type
- See Volume Initialization Type.
- Slip type
Determines the stickiness of the obstacle surface, called “Surface Adhesion”. Surface Adhesion depends in the real world on the fluid and the graininess or friction/adhesion/absorption qualities of the surface.
- No Slip
- Causes the fluid to stick to the obstacle (zero velocity).
- Free Slip
- Allows movement along the obstacle (only zero normal velocity).
- Partial Slip
- Mixes both types, with 0 being mostly no slip, and 1 being identical to free slip.
Note that if the mesh is moving, it will be treated as no slip automatically.
Example of the different boundary types for a drop falling onto the slanted wall. From left to right: no slip, partial slip 0.3, partial slip 0.7 and free slip.
- Animated Mesh/Export
- See Animated Mesh/Export.
- Amount
- Amount of mixing between no- and free-slip, described above.
- Impact Factor
- Amount of fluid volume correction for gain/loss from impacting with moving objects. If this object is not moving, this setting has no effect. However, if it is and the fluid collides with it, a negative value takes volume away from the Domain, and a positive number adds to it. Ranges from -2.0 to 10.0.