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Introduction to Computational Fluid Dynamics (CFD) - page 9 / 47

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9

Modeling (geometry and domain)

Simple geometries can be easily created by few geometric parameters (e.g. circular pipe)

Complex geometries must be created by the partial differential equations or importing the database of the geometry(e.g. airfoil) into commercial software

Domain: size and shape

Typical approaches

Geometry approximation

CAD/CAE integration:  use of industry standards such as Parasolid, ACIS, STEP, or IGES, etc.

The three coordinates: Cartesian system (x,y,z), cylindrical system (r, θ, z), and spherical system(r, θ, Φ) should be appropriately chosen for a better resolution of the geometry (e.g. cylindrical for circular pipe).

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