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boundary condition between mesh blocks

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Old   April 26, 2014, 10:46
Default boundary condition between mesh blocks
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What's the use of boundary condition in the intersection of two mesh blocks?
If the fluid can pass through it freely, which BC type should I choose?
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Old   April 28, 2014, 03:59
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Maxime
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You should use symmetry BC (this is the default BC).
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Old   April 28, 2014, 14:09
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FLOW-3D resets the boundary condition between blocks automatically to "inter-block" type. You can't set this yourself, FLOW-3D does it for you. Using 'symmetry' prevents some warning messages about resetting the condition.
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Old   April 28, 2014, 21:30
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I wonder if you could tell me what the meaning of BC Grid Overlay
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Old   April 29, 2014, 08:04
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thank you all. Maybe I haven't read the manual carefully enough
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Old   April 29, 2014, 11:09
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Quote:
Originally Posted by johnsonw View Post
I wonder if you could tell me what the meaning of BC Grid Overlay
Grid Overlay boundaries are only used in Restart simulations. They interpolate velocity from an existing simulation results. You can use them to change the mesh but still continue from the old simulation results.
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