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How To Make A Revit Model Ready For Pedestrian Wind Comfort Analysis Using SimScale?

There is an increase in the use of CFD validations, especially for Architectural designs from Revit. Therefore, it is important to know how to prepare Revit models to run a Pedestrian Wind Comfort Analysis (PWC). Read more about how to bring in Revit models to SimScale below.

SimScale provides a dedicated and easy to setup module for Pedestrian Wind Comfort Analysis. More about PWC analysis using simScale, can be found here – SimScale PWC

Objective

This article revolves around the workflow on how to open Revit files and define the scope of the model. This way we can ensure to create a valid CFD ready model from Revit.

Revit to SimScale Workflow

To explain the workflow, a detailed house geometry from Revit is take as an example.

Example Revit Model

By default, Revit opens a model in the Strucrual plans mode. 3D view can be accessed using View –> 3D as shown in the image below.

3D View

Checking the model to find insignificant components for external wind analysis

Generally, Revit models come with a lot of details. But for an efficient external CFD analysis, some of the details / components are not necessary. This sections shows how to identify them in the model and hence, defining the final scope of the model.

To browse through the components present in the model, Visibility Graphics can be used. Visibility Graphics (VG) in Revit displays the list of components / families included in the project. To access VG select View –> Visibility / Graphics as shown below:

Visibility Graphics

An external wind analysis would need only the basic components which defines the shape and topography of the builiding (s) to be analysed. Hence, it is encouraged to check the elements or parts necessary for the analysis.

Here is a list of important items necessary for a CFD simulation:

  • Ceilings,
  • Columns,
  • Curtain panel, Curtain system,
  • walls,
  • Topography
  • Floors,
  • Masses,
  • Roofs,
  • Site

Except the above mentioned items / groups, other items can be turned off. To make this effective in the 3D viewer, press Apply.

Best Practice

For external wind analysis, we wont need the Furnitures, Pipes, Fittings, Duct accesssories, Electrical equipments, Door bells, Safety systems, Wires, etc. In general, things which are relatively smaller in dimensions (<0.5m) are not encouraged.

Detailed model in Revit
Detailed Architectural model
Wind Analysis ready model from Revit
Clean model for Analysis

To know more about general CAD requirements for External Wind analysis check the following article:

How to Deal With Geometry Details and Features for Pedestrian Wind Comfort Analysis

Last updated: March 31st, 2020

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