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#1 |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
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Hi,
How do i can define velocity derivative as follow: ![]() Thanks. Best. Aja |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,901
Rep Power: 144 ![]() ![]() ![]() ![]() |
u.grad_x and so on for uvw and xyz.
Look in the CFX reference manual for the full list of variables, functions and operators on variables (like the gradient function). |
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#3 | |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
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Quote:
Should I define in Expressions? or user functions? I want to obtain a contour by using above function in post 1. |
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#4 |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
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I created as follows:
Now, How can i call this formula in contour panel? I want to obtain a contour by using defined function. Rotary is whole computational domain. Method is single reference frame. in Fact, i rotate whole computational domain. What is "Value=0.00490041"? Last edited by aja1345; April 22, 2016 at 16:55. |
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#5 |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
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I was wrong.
I created a new variable in expression panel as follows: And then volume integral : ![]() It is ok, but now How do i obtain a contour by using variable RRR? There is variable RRR in contour panel: ![]() Last edited by aja1345; April 22, 2016 at 09:48. |
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#6 |
Senior Member
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
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For contours, you can only plot variables, not expressions. You must create a new variable. And then maker the definition of that variable your expression.
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#7 | |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
Rep Power: 15 ![]() |
Quote:
According the following picture, i created new variable(VVV). Right? ![]() But, the contour of new variable(VVV) is not very good and clear, there are not different colors in the following contour of this new variable. why? ![]() ![]() Thanks Last edited by aja1345; April 22, 2016 at 06:12. |
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#8 | |
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Maxim
Join Date: Aug 2015
Location: Germany
Posts: 413
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Quote:
![]() you probably need to adjust your color range. 'local' is a good first shot but a lot of times you still too coarse. You probably know in which range your values should be - so start with that range. Something like min= 0 , max=10. Or min=10, max= 100. Etc. |
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#9 |
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Maxim
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Location: Germany
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#10 |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
Rep Power: 15 ![]() |
Thanks.
Now I want to export this contour to tecplot format. there was tecplot format in Fluent(for exporting), but i dont see this format in CFX. I am grateful that guide me about this case. |
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