Flow Visualization

CAE Flow uses NVIDIA Omniverse™ Flow to animate particles and combustion-style effects from scientific fields. Use it for qualitative motion and presentation. Use Streamlines when you need paths integrated directly through a velocity field.

Flow Environment

The Environment defines the Flow simulation domain.

1. Right-click a dataset and select Create > CAE Flow > Environment.

2. Select a Flow layer. Layer 0 is appropriate for a first simulation.

Fuel Injector (Sphere)

Fuel Injector (Sphere) emits Flow fuel from a transformable sphere.

1. Right-click in the Stage panel and select Create > CAE Flow > Fuel Injector (Sphere).

2. Position and scale the sphere within the Environment.

Dataset Injector

Dataset Injector voxelizes a scientific dataset and transfers selected fields into Flow.

1. Right-click a dataset and select Create > CAE Flow > Dataset Injector.

2. Under Velocities [Field Selection], add a vector field or its scalar components with Add Field.

3. Optionally add a scalar temperature field under Temperatures [Field Selection].

4. Use Dataset [Voxelization] to adjust Max Resolution, Region-of-interest (ROI), and Inflate Bounds (%).

Increase Inflate Bounds (%) when the Flow simulation needs space beyond the source dataset. The default is suitable for an initial result.

Boundary

Use Create > CAE Flow > Boundary to add a collision or boundary surface to an existing Flow simulation.

Start the Simulation

Select Play on the timeline to run the Flow simulation. Moving an injector changes where new particles enter the simulation.

Try It: Animate Flow Around the Vehicle

Continue from Try It: Tune the Color Mapping.

1. Hide the previous operators except the Faces representations of the vehicle.

2. Right-click Fluid_Domain and select Create > CAE Flow > Environment. Select layer 0.

   

3. Right-click Fluid_Domain and select Create > CAE Flow > Fuel Injector (Sphere).

   

   Position the sphere near the inlet side of the vehicle.

4. Right-click Fluid_Domain and select Create > CAE Flow > Dataset Injector.

   

5. Select the Dataset Injector. Under Dataset [Voxelization], set Inflate Bounds (%) to 100. This gives the Flow simulation room beyond the source-data bounds.

   

6. Under Velocities [Field Selection], add Velocity_0, Velocity_1, and Velocity_2 with Add Field. Leave Mode set to unchanged so the components form the velocity vector.

   

7. Select Play on the timeline.

   

Move the fuel-injector sphere to explore another emission region.