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having trouble understanding the Flow Direction option in periodic boundary |
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#1 |
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amirhossein
Join Date: Jul 2014
Location: Canada
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Hi
can any one help me on "Flow Direction" option in periodic boundary condition ? i didn't understand what is it and how set it thanks |
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#2 |
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amirhossein
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#4 |
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Aja
Join Date: Nov 2013
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I am simulating a turbine and I have Rotational periodic conditions. Here, I think that ""Flow Direction" should be set based on right hand rule.
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#6 |
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Aja
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#7 |
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what type of flow problem you are solving??
It is very much clear. It is direction in which you have pressure gradient. And it has nothing to do with right hand rule... !!! And are you sure that you need this boundary condition? |
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#8 | |
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Aja
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Quote:
My static pressure contour is as follows: According to above explanations, how do I set this direction? Last edited by aja1345; March 21, 2016 at 01:23. |
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Aja
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#12 |
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amirhossein
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i will be thankful if any body can help me
this is my problem as seen in the picture attacked rear and front wall are periodic and also this trapezoidal enclosure is incline. ( gamma angle in picture) i set rear and front as periodic without any special setting . that is enough ? or i should change flow direction. please attention that trapezoidal enclosure isn't flat and it is incline thanks |
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#13 | |
Senior Member
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Quote:
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#14 |
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amirhossein
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#15 |
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flow direction is used when you have pressure gradient in some direction. for example if you have long pipe and you want to model just a some finite length.
So at inlet and outlet, you just put the periodic conditions and provide direction and pressure gradient. So if pipe length is in x direction then you put direction as 1 0 0 |
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#16 | |
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amirhossein
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Quote:
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