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10.8 Solution Strategies for a Single Rotating Reference Frame

The difficulties associated with solving flows in rotating reference frames are similar to those discussed in Section  9.5.5. The primary issue you must confront is the high degree of coupling between the momentum equations when the influence of the rotational terms is large. A high degree of rotation introduces a large radial pressure gradient which drives the flow in the axial and radial directions, thereby setting up a distribution of the swirl or rotation in the field. This coupling may lead to instabilities in the solution process, and hence require special solution techniques to obtain a converged solution. Some techniques that may be beneficial include the following:

See Chapter  25 for details on the procedures used to make these changes to the solution parameters.




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