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Boundary condition that is open to atmosphere in control volume |
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December 4, 2016, 11:55 |
Boundary condition that is open to atmosphere in control volume
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#1 |
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Onur Özcan
Join Date: Feb 2016
Location: Istanbul/Turkey
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what should be boundary condition that is open to atmosphere in control volume?
Pressure outlet or symmetry, That is why I ask, I have seen a case made as symmetry. |
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December 4, 2016, 13:21 |
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#2 |
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SinaJ
Join Date: Nov 2009
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symmetry as outlet?! I would say, maybe in those cases they used it as periodic boundary.
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December 4, 2016, 13:27 |
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#3 | |
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Onur Özcan
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Quote:
Periodic boundary is recurrent model ? the thing I have asked is what boundary condition is defined in those enclosures,control volume ? Kind Regards, |
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December 5, 2016, 00:56 |
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#4 |
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Symmetry BC means: d(phi)/dn = 0, Un = 0, where phi - any variable, Un - normal velocity. Obviously there cannot be fluid flow through symmetry.
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December 5, 2016, 01:06 |
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#5 |
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Onur Özcan
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Model is attached. As you can see,outlet is very near to solid one. (that is my thought, maybe it is wrong approximation). How does boundaries in model be near to interest ? and what kind of boundary condition should be define it in model boundary ? all boundaries are imaginary. Because the model is control volume
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December 5, 2016, 01:18 |
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#6 | |
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Quote:
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December 5, 2016, 01:53 |
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#7 | |
Senior Member
Onur Özcan
Join Date: Feb 2016
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Quote:
So, as for model that I have defined , air (cooling air) is to define all imaginary boundaries (control volume). I take into condesiration on a solid material being heated via heat transfer and cooled by air.Which direction does the model be extended ? Actually I could not take into consideration air flow behaviour following cooling the material. I could say that I pay no attention how swirls or eddies are damped in symmetry boundary condition |
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