Inflow Object Settings

Ryan Guy edited this page Aug 6, 2018 · 9 revisions

Inflow objects are emit fluid into the domain continuously. Inflow objects must be Blender mesh objects and must be Manifold in order to work correctly and predictably within the FLIP Fluids simulator. If the mesh object is animated, the mesh must not change topology between frames. This means that the mesh vertices are always connected to the same neighbouring vertices.

Parameters

Enabled Whether the object is active and emitting fluid into the simulation domain.
Substep Emissions Number of times fluid is emitted from the inflow per simulation substep. Increase to reduce stuttering fluid artifacts with fast moving keyframed/animated inflow objects.
Inflow Velocity Mode The method in which the velocity of the emitted fluid will be set.
Manual
    Set the inflow velocity vector manually.
Target
    Set the inflow velocity vector towards a target object.
Inflow Velocity The inflow velocity vector (in m/s). This setting is only available if the Inflow Velocity Mode is set to Manual.
Inflow Speed The inflow fluid speed towards the target object (in m/s). This setting is only available if the Inflow Velocity Mode is set to Target.
Target Object The target object that will be used to calculate the fluid velocity direction. This setting is only available if the Inflow Velocity Mode is set to Target.
Notes: Target objects may be located outside of the simulation domain. Empty objects may be used as target objects. If the target object has non-zero size, the fluid velocity will be directed towards the center of the target bounding box.
Export Animated Target Export the target object mesh as an animated one. This setting is only available if the Inflow Velocity Mode is set to Target.
TIP: Animated objects can be slower to export, so use this option only if necessary, such as for armatures or parented objects. Objects with keyframed position/rotation/scale do not require this option to be enabled.
Add Object Velocity to Inflow Add the object velocity to the inflow fluid velocity. The object mesh must be rigid (non-deformable) for this option to work correctly.
Object Velocity Influence Amount of velocity that is added to the inflow fluid. A value of 1.0 is normal, less than 1.0 will dampen the velocity, greater than 1.0 will exaggerate the velocity, negative values will reverse velocity direction. This setting is only available if the Add Object Velocity to Inflow setting is enabled.
Mesh Type Type of mesh used for the inflow object. Used for calculating object velocities. This setting is only available if the Add Object Velocity to Inflow setting is enabled.
Rigid
    Mesh shape does not change/deform during the animation.
Deformable
    Mesh shape changes/deforms during the animation. Slower to calculate, only use if really necessary.
Constrain Fluid Velocity Force fluid inside of the inflow to match the inflow emission velocity. Enabling this option will allow an inflow to push around fluid when submerged and can also be used to fill up a tank when submerged. Setting low fluid velocity values will have the effect of slowing down fluid emission. See additional notes for applications of this setting.
Export Animated Mesh Export the inflow object mesh as an animated one.
TIP: Animated objects can be slower to export, so use this option only if necessary, such as for armatures or parented objects. Objects with keyframed position/rotation/scale do not require this option to be enabled.
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