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Old   June 1, 2011, 10:55
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xiaobao jia
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Hello;

I have to modify the velocity of every node in every iteration like ux+5, Uy-2, Uz+0, how can I use cel to fix it? any ideas? thanks a lot.



regards

jia
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Old   June 1, 2011, 18:31
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Glenn Horrocks
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You cannot do this in CEL. And I cannot see why you would want to do it anyway, there is no way this is going to converge.

What are you trying to do?
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Old   June 2, 2011, 09:47
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xiaobao jia
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thank you Mr. Glenn Horrocks, you are the guy I need to ask this question.

I am simulating a rotating airfoil, what I like to do is that I will put -w*r term in the convective term and diffusion term through velocity variations. I do think this is physics simulation of this problem rather than rotating mesh or domain.


Do you think I can fix this in cfx with user function?

regards

xiao
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Old   June 2, 2011, 19:18
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Glenn Horrocks
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You cannot do this by simply adding and subtracting velocity components!

Use the built-in rotating frame of references to do this. Of if this is not suitable please explain why not.
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Old   June 3, 2011, 11:03
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xiaobao jia
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Hi Mr. Glenn

This material is interesting, I will try this. Then I will inform you the result.

thanks

xiao
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Old   June 13, 2011, 10:58
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xiaobao jia
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Hi; Mr. Glenn


I think this method is only valid for Euler equation ( inviscid solution), because rotation velocity can not give full or a part of natural boundary layer velocity.


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xiao
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