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Documentation

How to Visualize the Mesh in a PWC Analysis?

How can I visualize the mesh in PWC Analysis (Pedestrian Wind Comfort)?

visualization the mesh resolution in pwc pedestrian wind comfort analysis on simscale
Figure 1: Mesh resolution in PWC analysis.

Solution

To be able to visualize the mesh in PWC Analysis, you must select an individual wind direction result.

Please visit the documentation page to learn more about the PWC Analysis type. Additionally, this page explains the mesh settings in PWC analysis in more detail.

Note

Additional refinements are added in the leeward side of the buildings to accurately resolve the wake region. This refinement is adapted for each wind direction individually per the actual wind direction. Consequently, you will see an individual mesh result per wind direction.

Best Practices

1. View the mesh result in an individual wind direction 

To see the mesh on a fluid domain in an individual wind direction, follow the these instructions:

  1. Select a Simulation run.
  2. Expand the Direction tree.
  3. Choose Additional results.
  4. Select the Mesh result.
  5. Visualize the Surface mesh.

Mesh on a fluid domain surface is not intuitive enough, because this is the global mesh resolution. In other words, it usually does not show the additional mesh refinements. A good approach to see the additional refinements is to hide the flow domain and visualizing the mesh on cutting planes.

2. View the mesh resolution on cutting planes

The following picture shows how to handle the visibility of parts in the SimScale post-processor:

control over the visibility of parts in post-processing while reviewing the results in the simulation
Figure 2: You can control the visibility of parts in post-processing
  1. Expand the Parts tree.
  2. Hide the fluid volume and any unnecessary solid parts. Keep only buildings and the ground.

To see the mesh, you must now create a cutting plane demonstrated in the picture below:

creating a horizontal mesh clip in pwc post-processor within the simscale platform
Figure 3: Creating a horizontal mesh clip.
  1. Click the ‘+ button‘ next to the Cutting Planes. This will create a Cutting Plane 1.
  2. Select the direction of the Normal. In this example, the horizontal plane is Z-Normal.
  3. Adjust the ‘Slider’. This will adjust the elevation of the horizontal plane. You can either use the slider or click the icon and type the coordinate.
  4. Set the Scalar to ‘none’.
  5. Deselect the ‘Clip model‘ option and select ‘Show element mesh‘ instead.

You can follow the same steps to create a vertical mesh clip too if desired. Simply change the Normal and adjust the Point coordinate.

creating a vertical mesh clip in pwc post-processor in simscale
Figure 4: Creating a vertical mesh clip.

Did you know?

The sizing for the background mesh for the PWC analysis is highly automated. Often, the user does not need to do any mesh sizing other than adjusting the fineness from Moderate to Fine. Mesh sizing targets towards the specific use case, thus it works best for model sizes of 1 – 10km2 and a region of interest radius of 200m – 500m.

Note

If none of the above suggestions solved your problem, then please post the issue on our forum or contact us.

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