Select the Flow Visualization tab to load the computed flow field (velocity and pressure, *.vap). Dependent on the selected Computational Direction(s), result fields can be available for flow in X-, Y-, and/or Z-Direction.

Select the flow direction, then click Load. A dialog pops up, that let's you select which of the stored field components VelocityX, VelocityY, VelocityZ, Velocity, and/or Pressure you want to load and visualize.

Check Allow Clipping by Distance if you want to use this feature in the visualization. If selected, an additional data field is computed and loaded that contains the Euclidean distance to the solid structure. You can use this data field, e.g., to print arrows only with a certain distance from the solids. If you do not need this feature, do not select it, as it requires additional RAM to store the distance field.

Result files computed with the LIR solver are stored using the adaptive grid of the LIR solver (LIR-Grid Compression). Select if you want to interpolate the data during import to the regular voxel grid or if you want to keep the adaptive grid:

• Decompress to Regular Grid: More RAM is needed to load the data, and you cannot visualize the adaptive grid. This option enables the visualization with Streamlines, Arrows, and Schlieren.
• Keep Adaptive Grid: Less RAM is needed to load the data. You can visualize the adaptive grid. You cannot use Streamlines, Arrows, or Schlieren to visualize the results.

The structure that the solver used internally is loaded if Load structure with closed pores is checked. This structure shows which pores have been closed due to prior geometry analysis.

Visualization Options

• Volume Field: Pressure drop or velocity are visualized by a 3D color field - you can clip by threshold values or use transparency to view inside.
• Streamlines: Visualize the flow through the structure with streamlines or animated streamlets.
• Arrows: Visualize the velocity vector classically with arrows.
• Schlieren: This option uses Line Integral Convolution (LIC) fields to visualize vortices.