A fluid mechanics simulation requires the air/fluid volume. For internal fluid flow analyses, this region needs to be created as a single part.
This can be done on the SimScale platform and is called Fluid Volume Extraction. There are three methods available:
This operation generates a fluid volume for an open inner region. The extraction is performed by:
By default, the solids are removed when the fluid is created. It is possible to keep them by enabling the ‘Keep Existing Parts’ toggle.
Fluid volume with existing solid parts
This feature enables the creation of fluid regions within closed volumes. The operation here is similar to the case above, except only one internal seed face is required. An example of the operation performed on a theater CAD model is shown below.
This option is generally used for external flow problems. The operation is performed by sizing the enclosure and then running the extraction operation. The example below shows a half symmetry air domain being created for a race car CAD geometry.
A demo of the above cases can be found in the link below: