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Boundary Condition Elements: CLxx (5)
The model is implemented as follows:
1. For each element CLxx representing a pressure drop across a perforated
plate, search the structural node S corresponding to each node F of the
element, and store this information in internal variables of the element;
2. When calculating ‘internal’ forces for such an element, evaluate first the
pressure drop ∆p across the element as a function of fluid and possibly plate
velocity. Then, compute the nodal forces generated by this pressure drop: add
these forces to the fluid nodes and subtract them from the structural nodes;
3. When calculating grid velocities for the ALE fluid nodes, assign to each
fluid node F the same velocity as the corresponding structural node S.
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Exercise/Example 11 – Perforated Plate
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