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.
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