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Difference between Moving Wall and Moving Boundary

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Old   January 12, 2018, 10:02
Default Difference between Moving Wall and Moving Boundary
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I am wondering if there is any difference between a moving wall and moving boundary, or if these terms are used interchangeably?

From the research I have completed on the topic I cannot find an exact definition for a moving boundary, my best guess for the difference between the two is that fluid may pass through a moving wall but not a moving wall.

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Old   January 12, 2018, 10:06
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also i have similar question in the topic below

Best rotating model for turbine
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boundary, difference, moving, wall

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