Averaging during a steady state simulation

say · July 10, 2013, 06:56

HI,
my question is:

Is it possible to average a variable during a steady state simulation like in a transient calculation? I defined a variable "pressure recovery" and its value is swinging each Iteration. And I need a Expression or something like that, that can average the variable automatically. so i can monitor the value of it during the steady state simulation.
Can someone help me plz. I hope u understand my problem.
thanks

monkey1 · July 10, 2013, 08:23

hmm...I would try writing an expression by myself and assigning its value to a variable.
But I don't know if it works in CFX as it would in a regular programming language.
I would try this:
expression ownaverage
sum_pressure_recovery=sum_pressure_recovery+pressu re_recovery
ownave=sum_pressure_recovery/number of iterations

and then create an own variable pressure_recovery_ave wich would be linked to the expression ownaverage

Just a guess...maybe it works

...Or others may have an easier solution

say · July 10, 2013, 09:38

thanks. i'm going to test it and give a response

Mazze[ITA] · November 3, 2015, 10:18

Dear say, did your solution work?

July 10, 2013, 06:56	Averaging during a steady state simulation	#1
say New Member say Join Date: Sep 2009 Posts: 7 Rep Power: 17	HI, my question is: Is it possible to average a variable during a steady state simulation like in a transient calculation? I defined a variable "pressure recovery" and its value is swinging each Iteration. And I need a Expression or something like that, that can average the variable automatically. so i can monitor the value of it during the steady state simulation. Can someone help me plz. I hope u understand my problem. thanks

July 10, 2013, 08:23		#2
monkey1 Senior Member Join Date: Jul 2011 Location: Berlin, Germany Posts: 173 Rep Power: 15	hmm...I would try writing an expression by myself and assigning its value to a variable. But I don't know if it works in CFX as it would in a regular programming language. I would try this: expression ownaverage sum_pressure_recovery=sum_pressure_recovery+pressu re_recovery ownave=sum_pressure_recovery/number of iterations and then create an own variable pressure_recovery_ave wich would be linked to the expression ownaverage Just a guess...maybe it works...Or others may have an easier solution

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July 10, 2013, 09:38		#3
say New Member say Join Date: Sep 2009 Posts: 7 Rep Power: 17	thanks. i'm going to test it and give a response

November 3, 2015, 10:18		#4
Mazze[ITA] Member Lorenzo Mazzei Join Date: Dec 2010 Posts: 60 Rep Power: 15	Dear say, did your solution work?