For example, this can be used for:
-in sand casting, when u have a model like this pump, and we need to have the inner core...
To get a more accurate model of the internal geometry, main model must be more accurate, I mean on the draft angle during the creation of a model ...
Ok, this is it, enjoy...
Here is a model of centrifugal pump housing, can be found here: Centrifugal pump housing
For this model i use some trick how to get a internal geometry (3D model)
All you need to do on this model is to close all openings, like to the picture...
In the Flow Simulation feature, first click check geometry, than fluid volume...
Fluid volume will be calculated...see on the pics
Check the Create fluid body assembly, and than click check...
Here is a result...this is a PART...remember its created by fluid inside housing.. ;)
another one render...