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sliding meshes, velocity discontinuity

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Old   January 12, 2011, 02:22
Default sliding meshes, velocity discontinuity
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J.-H. Wang
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Hi,

I'm simulating a horizontal axis turbine and yet there are some problems on the interface of rotation, where abnormal discontinuity of velocity occurs. Two graphs from the front and side are attached. I leave the default settings on the mesh interface and there are two separate volumes with different faces coincided. Please take a look on the graph and perhaps give me some advices. Thanks.
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File Type: jpg discontinuity.jpg (36.6 KB, 28 views)
File Type: jpg discontinuity2.jpg (30.5 KB, 25 views)
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Old   January 12, 2011, 02:27
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J.-H. Wang
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And I''m using "sliding mesh" with Re~1E+7 and TSR=5 (velocity=1.4m/s, w=0.7rad/s), LES with time step=0.0025 (CFL<0.1). Thank you.
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