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something about the Periodic boundary condition in fluent |
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#1 |
New Member
mikewong
Join Date: Apr 2018
Posts: 11
Rep Power: 8 ![]() |
Hello
I have a problem about using the Periodic . I am going to make a model like the picture , flow over a plate ,and make some groove to reduce the drag, the boundary condition is that velocity inlet .out flow flow direction is x the direction z is periodic condition . the problem is that same size of the v groove in the two picture. but when i got the results,the wall-shear stress on the V groove is obviously different I WANT to know that: 1can this periodic stimulate the cast that flow over a plate with groove? 2.and what make the difference between the two case? 1.jpg 2.jpg 3.jpg |
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#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,728
Rep Power: 66 ![]() ![]() ![]() |
You should get the same result.
Try tinkering with the mesh. It looks like you have skewed cells and high aspect ratio cells everywhere. I'm surprised it didn't blow up in your face. |
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#3 | |
New Member
mikewong
Join Date: Apr 2018
Posts: 11
Rep Power: 8 ![]() |
Quote:
I find that i had made the quality about the aspect ratio is bad. this problem is just because of high aspect ratio? or maybe other reason? now i am going to set more nodes along the X direction thanks |
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periodic boundary fluent |
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