defining new expressions
Dear all,
good morning. I am simulating the flow within the diffuser of a centrifugal compressor and I'd like to post-process some properties (static pressure recovery coefficient, total pressure loss coefficient, efficiencies...) which are not available by default. They are of course functions of variables which are available in CFX-Post (like pressures, temperatures, velocities...). Of course I know the formula to calculate them: how can I implement those formula in CFX-Post, in order to analyze them? Thank you. Kind regards, MAttia. |
Yes, define expressions from available variables to form variables you want. Define a quantitative that include the expression first, and then a variable.
Enjoy your work! |
Yes, I got that.
But my problem is: how do I define those expressions?! Let's say I have 2 variables x and y and I want to calculate z=2*x+y: where do I write that formula?! Probably you are saying in the quantitative window: OK, but how?! I try to add something new, but I couldn't. Thank you. Kind regards. |
For your example, just give a name for a quantitative, coorZ, for example. Then define the quan as 2*x+y. It is so simple. Then define a variable as cZ, select the quantity coorZ as the expression. Just give different names for the quantitative and variable. Or there will be conflicts of name convention.
I think you did not have a good look at the documentation, right? Do this to fix your puzzle, it will help you much. ^_^ |
Well, I had read the manual, but with your answer it was easier to understand. ;)
Thanks a bunch! Cheers, M. |
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