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When doing Liquid simulations, Phoenix FD populates the grid Velocity channel only for cells / voxels inside the liquid volume - empty (air) voxels contain no velocity information. To generate velocity information for the empty voxels, enable Simulate Air Effects under the Dynamics roll-out rollout of the simulator and re-run the simulation.

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||Thinking Particles Properties window|| > Dynamic Set > Operators > Phoenix FD > PhoenixFD TP Force

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Inputs

 

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Time [ time ] – Time at which the TP Force operator should evaluate. 

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Seed [ integer ] – Overrides the value set in the TP Operator's UI.


Parameters

 

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Phoenix Simulator node – Determines which simulator will be used to read the velocity.

Influence | influence – Determines how strong the fluid holds the particles. A value of 100% means that the particle will follow the fluid exactly. A value of less than 100% causes the particle's speed to only approach the fluid's speed. For example, a value of 10% means that at every integration step the velocity of the particle will overcome 10% of the difference between its velocity and fluid's velocity.

Infl. Variation | influence variationAllows you to vary the Influence of the simulation over the particles, on a per-particle basis. High variation will cause some particles to be heavily affected by the Phoenix FD simulation while others receive none or close to none of their velocity from the fluid.

Seed | seed  – An initial value for the random numbers generator.

Ignore Time Scale | ignore_play_speed – When enabled, the Play speed parameter of the Simulator is not taken into consideration.

Affect Orientation | rotate – When enabled, the particle is rotated in correspondence to the fluid's motion.

Delete Particle Outside | delete_outside – When enabled, particles which exit the Simulator's grid will be deleted. Note that the grid size of the loaded cache by the simulator will be used for this check and if there is no loaded cache, no particles will be deleted.

 

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