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Setting temperature on a patch for laplacianFoam

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Old   June 15, 2011, 23:49
Default Setting temperature on a patch for laplacianFoam
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Bruce Hartley
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I just want to set a simple patch at a definable temperature in a simple model to use to solve with laplacianFoam. I have copied the tutorial example but it is too difficult to understand and the users instructions are insufficient for me to use. So, what do I need to put into blockMeshDict and in other places if required, in order to set some temperature boundary conditions on a very simple Laplace's equation solution?

Thanks
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Old   June 16, 2011, 03:35
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Anton Kidess
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You just use blockMeshDict to define and name your patches. The boundary (and initial) conditions are set in the files in the 0/ directory. So if you want to set a fixed temperature on a certain patch, you add / edit that patch in 0/T:

Code:
patchName {
       type    fixedValue;
       value   uniform 500;
}
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Old   June 16, 2011, 04:25
Default But whaqt goes into the blockMeshDict file?
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I can see that type of definition in the 0/T file but I can't make sense of what I need to put into the blockMeshDict.

Things like

patches
(
patch1 fixedValue
(
(0 1 10 9)
)
)

give errors
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Old   June 16, 2011, 07:46
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Anton Kidess
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I'm not psychic, so "gives errors" won't help a lot in fixing your problem. Anyway the general way to define a patch is:

patch_type is either patch or empty in most cases, and patch name is whatever you want to call it (although fixedValue might not be the best idea because it clashes with an openfoam type, to avoid confusion better call it something like Dirichlet).

patches
(
patch_type patch_name
(
(four point indicies that make up a patch)
)
)
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Old   June 16, 2011, 20:58
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Akkides, Thanks, I have it now.

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