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number of nodes in solid domain

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Old   May 2, 2012, 04:24
Default number of nodes in solid domain
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Hi,

I want to know what decides the number and distribution of nodes in a solid domain in a CHT problem.(Like we have y+ for a fluid domain).

Thanks
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Old   May 2, 2012, 18:17
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It is determined by your mesh, obviously.

But I think you are asking what should you consider as you mesh a solid body for CHT simulation.

In a solid the only thing you are resolving is the temperature gradient. In steady state simulations this is usually much more gentle than any flow gradient, meaning a much coarse mesh is acceptable. In transient simulations you need to resolve the temperature gradient in time and space - if you are trying to resolve a very fast temperature transient then you will need a fine mesh to resolve it.

In the unusual case of a transient simulation with a fast temperature gradient inflation layers may be appropriate. Otherwise, a coarser mesh is usually fine as it simply has to resolve the temperature gradients.

But as ever, check it with a mesh sensitivity study to check that it is OK.
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Old   May 2, 2012, 21:18
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Thanks Glenn
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