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defining bondaries in multy-blocks

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Old   December 18, 2012, 02:21
Default defining bondaries in multy-blocks
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Hi, there.
The problem i face is how to define bondary type in the connection of two blocks.
The model i created must use sevral blocks to cover,at first i used symmetry bondary to define the connection of two blocks ,but in the analys tab i only can see the part in the first block,the others are missing. then i tried the specified pressure bondary type, it did'nt work either. now i am confused about it. Can you help me?( the model is a spillway.)
thanks!
Best regards!
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Old   December 18, 2012, 18:00
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You don't need to specify any particular boundary type at the interface of two blocks. The interface has to line up exactly (if the blocks are 'linked'), or the smaller block needs to be inside the larger block entirely. On the Analyze tab, look for the 'Mesh Blocks' button at the bottom and make sure all blocks are activated for display.
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Old   December 18, 2012, 20:31
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so just specify the ‘linked’ block according to the default Settings ?
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Old   December 22, 2012, 14:25
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Quote:
Originally Posted by jacky831 View Post
so just specify the ‘linked’ block according to the default Settings ?
I don't know how to make it linked but I specified the joint boundary as 'symmetry' and simulate it. it wroks. I wonder is it correct or not?
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Old   November 7, 2013, 15:21
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In the code of the case you should put ibct(5)=9, in the right mesh

IBCT(n)
Boundary condition type at mesh block boundaries
1, = symmetry plane
2, = rigid wall
3, = continuative boundary
4, = periodic boundaries (must be applied at opposite sides of mesh)
5, = specified pressure boundary
6, = specified velocity boundary
7, = boundary values obtained from previous calculation using grid overlay (GO) procedure
8, = outflow boundary that minimizes wave reflections
9, = inter-block boundary
10, = surface wave boundary (for n=1, 2, 3 and 4 only)
11, = specified flow rate boundary (Volume flow rate)
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