Computational Fluid Dynamics

Visualizing Computational Fluid Dynamics

This tutorial shows common visualization techniques for cfd datasets. We will be using the dataset disk_out_ref.exo, found in Paraview under File/ Open/ Examples. It has a vector field in it called V.

Slices

• File → Open → Examples → disk_out_ref.exo.. On the Properties tab, click Apply.
• Filters → Common → Slice. Apply. Unselect the Show Plane.
• Color by: v.
• In the pipeline browser, select disk_out_ref.exo
• Filters → Common → Slice. Y Normal. Apply. Unselect the Show Plane.
• Color by: pres.
• View → Color Map Editor → Presets (the little envelope with a heart) → Turbo.
• Select disk_out_ref.exo in the Pipeline Browser. Turn on visibility (click on the eyeball to the left).
• In the Properties tab, (down a few pages), change Opacity to 0.4.

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Stream Tracers - lines and tubes

• File → Open → Examples → disk_out_ref.exo.. On the Properties tab, click Apply.
• Filters → Common → Stream Tracer. v. Seed Type: Point Cloud. Uncheck Show Sphere. Apply.
• Color by: v.

Lines don't color as nicely as surfaces. Lets add a tube filter around each streamline.

• Filters → Search. Type Tube. Apply.

Now, we want to know which directions the particles are moving. We will use a glyph filter. Note we place the glyph filter on the streamline, not the tube.

• Select StreamTracer in the Pipeline Browser.
• Filters → Common → Glyph. Glyph Type: Cone. Orientation Array: v. Scale Array: v . Very Important - Scale Factor select the recycle button to the right. Apply.
• Color by: temp.
• View → Color Map Editor → Presets (the little envelope with a heart) → Black Body Radiation.

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