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发表于 2006-10-31 10:55:37
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求助CFX达人:做轴流水泵计算不收敛,怎么办?
建議你不要用k-e model, 在CFX手冊中有提到幾種狀況不用 k-e
-----quoted from ansys cfx manul--------------------
While standard two-equation models, such as the k-ε model, provide good predictions for
many flows of engineering interest, there are applications for which these models may not
be suitable. Among these are:
• Flows with boundary layer separation.
• Flows with sudden changes in the mean strain rate.
• Flows in rotating fluids.
• Flows over curved surfaces.
A Reynolds Stress model may be more appropriate for flows with sudden changes in strain
rate or rotating flows, while the SST model may be more appropriate for separated flows. For
details, see The k-e model in ANSYS[br][br][以下内容由 kiddo 在 2006年10月31日 10:59am 时添加] [br]
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. try to run auto timescale for 100 steps or so.
. and change timescle to 10 times of auto timescale , and run it again
by using previous run *.res as initial file
. Be sure to monitor the flow/imbalance/force to be stable.
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