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How to Export a Model From Revit to SimScale?


This article shows how to export a Revit model and import it into SimScale for simulations. This answers the following frequently asked questions:

  • Can I export Revit models to SimScale?
  • Can SimScale import native Revit formats?

Supported Formats From Revit

SimScale supports two of the Revit CAD export formats.

  • ACIS (.sat)
  • STL (.stl)

ACIS (.sat) Export

Revit supports a direct ACIS file export. Once when the model is ready and watertight without gaps, users can export it from Revit using File –> Export –> CAD Formats –> ACIS (SAT).

acis export revit to cfd
ACIS Export
  • Next, Revit asks for items to export.
  • Selecting an in-session view/sheet set option from the list ensures the export of only elements in the current view.
  • Then select Next to export the Revit model as ACIS.
acis export options revit
ACIS Export Options

STL Export

In the case of complex Revit models like cityscapes or building masses, STL exports are handy. An STL export option is possible only with a Revit add-on.

Details about how to get the Revit STL exporter can be found here.

  • To export a Revit model or project as an STL, click Add-Ins –> STL Exporter for Revit
  • To import the model with the correct size, units selected here should match at the time of SimScale CAD upload.
stl options revit to simscale
STL Export Options
Categories Selection for STL export
Categories Selection for STL export

To find out how to import a CAD model to SimScale and other CAD requirements click here.

Note: To use STLs from Revit for internal flow, structural and Incompressible analysis types, they have to be modeled watertight (without gaps ). Except for LBM/PWC analyses, it is advised to use an ACIS CAD format.

Last updated: April 1st, 2021

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