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Documentation

Geometry for Pedestrian Wind Comfort

Our Pedestrian Wind Comfort, PWC, analysis type takes all the standard geometry formats that we advertise in the geometry upload section of the documentation. Typically, however, geometry comes from one of the common tools used by architect firms and wind engineers, which are mainly Sketchup and Rhino (others exist and if they can export STL then they are also fine). Therefore the main format types relevant here are Rhino (.3dm) and STL (.stl). 

We strongly advertise that our Lattice Boltzmann Solver, and subsequently the PWC analysis type requires no geometry cleaning to get a working simulation. That said, the quality of results tends to match the quality of the geometry and therefore we provide a geometry guidelines section in the documentation that outlines requirements in terms of sizing, features and things that might impact results or user experience. 

The guidelines available are:

  1. Basic Geometry Requirements for PWC.
  2. How to Deal With Geometry Details and Features for PWC Analysis.
  3. How to Add Topology or Terrain to a PWC Analysis.
  4. How to Extend Terrain With an Example in Rhino.
  5. How to Export a File as an STL From Rhino.
  6. How to Export a Model From Revit to SimScale.
  7. How Does PWC Analysis Type Deal With Complex Geometry at The Boundary

In the Pedestrian Wind Comfort analysis, the geometry should be uploaded in real physical sizing, i.e. scaled-down models should not be uploaded. The default unit is meters, and therefore, when and if exporting STL geometry, you should ensure that this unit is used in the model beforehand to make sure no scaling is done in the upload process. You can also select units when uploading STL’s to the SimScale platform so this can be done by matching the unit in the CAD or on the SimScale platform, but care should be taken to get this right.

Geometry orientation

The geometry should have the Z+ direction as the up orientation, i.e. Z axis points to the sky. Also, although not strictly required, the PWC analysis type uses the Y axis by default to orientate to north, this can be corrected in platform, but usually geometries are also created with this in mind.

Note

If you still have questions stoping you to start simulating, then please post the issue on our forum or contact us.

Last updated: June 30th, 2020

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part of: Pedestrian Wind Comfort Analysis

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