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Geometry and CFD Mesh

1.        Ensure the geometry is adequately defined. - If CAD-generated it may need ‘repairing’,  'cleaning-up' or ‘de-featuring’ so that it is suitable for CFD analysis.

2.        Position the domain boundaries.  Check that these match the geometry & that the position of `free' boundaries does not adversely influence results.

3.        Carry out the simulation using 3-D geometry, unless it can be shown that a 2-D simplification is applicable and does not mask 3-D flow phenomena.

4.        Construct the CFD mesh to adequately represent the geometry, & in particular the key flow features, to the required accuracy.  Consider mesh refinement checks to establish solution sensitivity to the mesh.

5.        Ensure that the mesh meets the requirements of physical models, e.g. near-wall models or void fraction limits.

6.        Be alert to mesh quality issues & restrictions.  Implicit or explicit limits to cell aspect ratio, cell-to-cell expansion factors,skewness requirements, etc.

7.        Check the resulting CFD mesh, using automated tools where possible, to ensure it meets mesh quality criteria,is connected & correctly generated.