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June 1, 2011, 10:55 |
help
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#1 |
New Member
xiaobao jia
Join Date: Jun 2011
Posts: 7
Rep Power: 14 |
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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June 1, 2011, 18:31 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,712
Rep Power: 143 |
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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June 2, 2011, 09:47 |
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#3 |
New Member
xiaobao jia
Join Date: Jun 2011
Posts: 7
Rep Power: 14 |
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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June 2, 2011, 19:18 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,712
Rep Power: 143 |
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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June 3, 2011, 11:03 |
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#5 |
New Member
xiaobao jia
Join Date: Jun 2011
Posts: 7
Rep Power: 14 |
Hi Mr. Glenn
This material is interesting, I will try this. Then I will inform you the result. thanks xiao |
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June 13, 2011, 10:58 |
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#6 |
New Member
xiaobao jia
Join Date: Jun 2011
Posts: 7
Rep Power: 14 |
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. regards xiao |
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