CFD geometry creation

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Seeking to understand the process others use translate, generate, or otherwise create geometry for SimScale CFD modeling. SimScale has preferred file formats of Parasolid (.x_t, .x_b), and ACIS (.sat).

Curious to know what workflows / processes others have undertaken to translate Revit models (either architectural or MEP); simplify these models to the remove unnecessary elements or levels of detail, and then export the models in the formats stated previously. Have concerns on model complexity and the reliability of the original Revit models to function as a base for an analysis model as we work with with multiple architects. Open to any & all ideas