Creating averaged value of an expression

AS_Aero · October 2, 2018, 08:46

Hi All

I have given an expression for power in CFX and now I am running a transient case and hence i want to get the average quantity of the Power. But in the average statitstics its not visible, I might have to create a variable, but I am not sure how.

Secondly this averaged power has to be same at the converged RANS simulation value right ?

urosgrivc · October 2, 2018, 08:57

Do you want to observe your value during the solution process?
If yes then:
You have to make a MONITOR POINT from your expression.
it is under output control

Gert-Jan · October 2, 2018, 09:00

In output control, you should define a monitor equal to your power-expression.
Then in the solver manager, you should create a graph where you plot the power. Then after the run, you can export the values and determine the average in a spreadsheet.

I don't understand you second question. I think you mean that the power has to become constant. In that case, if possible yes, but it will be fluctuating a little because of your rotating rotor.

October 2, 2018, 08:46	Creating averaged value of an expression	#1
AS_Aero Senior Member Join Date: Mar 2013 Location: Germany Posts: 357 Rep Power: 14	Hi All I have given an expression for power in CFX and now I am running a transient case and hence i want to get the average quantity of the Power. But in the average statitstics its not visible, I might have to create a variable, but I am not sure how. Secondly this averaged power has to be same at the converged RANS simulation value right ?

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October 2, 2018, 08:57		#2
urosgrivc Senior Member urosgrivc Join Date: Dec 2015 Location: Slovenija Posts: 365 Rep Power: 11	Do you want to observe your value during the solution process? If yes then: You have to make a MONITOR POINT from your expression. it is under output control

October 2, 2018, 09:00		#3
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	In output control, you should define a monitor equal to your power-expression. Then in the solver manager, you should create a graph where you plot the power. Then after the run, you can export the values and determine the average in a spreadsheet. I don't understand you second question. I think you mean that the power has to become constant. In that case, if possible yes, but it will be fluctuating a little because of your rotating rotor.