GiD - The personal pre and post processor

Iso surfaces

Menu: View results->Iso surfaces
With this result visualization a iso-surface is drawn passing through all the points which have the same result's value inside a volume mesh (iso-lines for a surface mesh). To create iso-surfaces there are several options.

  • Select View results->Iso surfaces->Automatic width->Velocity->|Velocity| through the menu bar or clicking on on the results view icon bar.

After choosing the result, you are asked for a width. This width is used to create as many iso-surfaces as are needed between the Minimum and Maximum defined values (these are included).

  • Enter the value 0.25727 to get the picture below.
  • Select View->Render->Smooth in order to get a better view.


Several configuration options can be set via the preferences window .


Menu: Utilities-->Preferences
In the Postprocess-->Iso surfaces tree
Display style the style of the iso-surface (similar options to the style of each set), set it to Body.
In order to see the inner zones we will set the transparency on the iso surfaces.

  • Select Transparency: Transparent
  • Move the model to see the inner zones
  • Restore again Transparency: Opaque



Other interesting options are:

  • Color mode allows to draw the iso-surfaces with a single color (Monochrome), according to the results used to create the iso-surface (Result color) or using the color map of the visualized contour fill result (Contour fill color).
  • For instance, select Color mode = Contour Fill Color and
  • Do a contour fill of Pressure:

  • Show isolines this option allows the user to switch isolines of surfaces on or off. Switch it off.
  • Draw always if this option is selected the iso-surfaces are always drawn even though all the meshes are switched off.


It is possible to convert the iso-surfaces in a mesh of triangles, with the menu: Geometry->Convert->Iso surfaces to sets
Then a new mesh will appear in the view style window. This mesh could be for example exported to a file, or use the rest of mesh operations.

COPYRIGHT © 2022 · GID · CIMNE