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The PhoenixFDSimulator Grid rollout lets you set the boundaries, size and resolution quality of the sim. Regarding size, the Phoenix Simulator works best when the scale of the container matches the real-world size of the simulated effect. For example, If if you are simulating a camp firecampfire, your container should be at most a couple of meters wide. Note that it doesn't does not matter if this is two meters or two thousand millimeters - the way you view the units is irrelevant. Phoenix always converts the units to a common world-size length, so the only important thing is the size of the container. If you are simulating a volcano, for example, the container should be several hundred meters wide, or several hundred thousand millimeters.
Using the parameters on this roll-out rollout you can:
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UI Path: ||Select Select PhoenixFDSim|| > Attribute Editor > Grid rollout |
Parameters
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Example:
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Scale
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size | medium |
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The The following video provides examples to show the differences when Units (or Scene) Scale is set to 1.0of Scene Scale with values of 0.1, 5.0 , and 15and 15.0. |
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Example: Grid Resolution
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size | medium |
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The The following video provides examples to show the differences when the Total cells from the Grid' ss Resolution isis at 570,000, 4,000,000 ,and 16,000,000. |
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Example: Setting up a 2D Simulation
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size | medium |
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A 2D Simulation can be performed by adjusting the Grid dimensions such that either X Size, Y Size, or Z Size is set to 1. The main application of this feature is to create very wide fires that would otherwise be time-consuming with a 3D simulation, like the image below. To keep features like the embedded gravity and pressure decay, it is recommended to leave the Y direction active and set the X or Z size to 1. |
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Container Walls
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Geometry Connections
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Use Cascade Simulator | gridUseCascade – When enabled, turns on the Cascade Connection Simulator. The liquid will be transferred from another simulator to this one in the region where both simulators intersect.
Set Selected Object as Cascade Simulator – Specifies another Phoenix Simulator which will transfer fluid to this simulator. This allows you to join several simulators into a structure with a complex shape. This can help you reduce memory usage by using many smaller simulators in place of a single large simulator. To set the Cascade simulator, select the main simulator first, then select the simulator to be used for the cascade. Then from the top Phoenix FD Menu choose Set Simulator Cascade Connection. For more information, see the Cascade tutorial for liquid simulations. For fire/smoke, see the Connecting Two Simulators in a Cascade Setup section on the Tips and Tricks page.
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Cascade Simulator | gridCascade – Shows the currently selected Cascade Simulator.
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Grid Adaptation
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Limited By | gridLimitedBy – Determines whether the grid's expansion is limited. If it is limited, this parameter also determines the units in which the Limited To value is expressed.
None – No limitation. If Preallocate Memory is enabled, this means all available memory can be used.
Memory – The expansion is limited by the total consumed memory. The limit is specified in percentages.
Cells – The expansion is limited by the cell count. The limit is specified in millions of cells.
Limited To | gridLimitedTo – Specifies the limit of grid expansion if Adaptive Grid or Preallocate Memory are enabled. The meaning of this value corresponds to the Limited By parameter.
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Manual Adaptation Limits
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