How to get two Transient Statistics (Start/Stop Iteration is different) ?

thu_wang · March 11, 2016, 09:50

Hi everyone,

I defined two kinds of Transient Statistics in CFX-Pre, their Start/Stop Iterations are different. But when I opened the *.res file, I found that there is only one kind of variable.Trnavg. And I don't know the variable.Trnavg in result file is Transient Statistics 1 or Transient Statistics 2.

Who can tell me what's wrong with the settings?

Thanks in advance.

-Maxim- · March 14, 2016, 05:26

I would assume it depends on which time step you loaded. So between 2793 and 3200, you have statistics 1.
I don't know what happens for the other time steps, though.
Why do you even have two statistics defined for the same variables?

thu_wang · March 16, 2016, 09:30

Quote:

Originally Posted by -Maxim-

I would assume it depends on which time step you loaded. So between 2793 and 3200, you have statistics 1.
I don't know what happens for the other time steps, though.
Why do you even have two statistics defined for the same variables?

Firstly, thanks for your answer. In your opinion, when after step 3200, I get statistics 2, and statistics 1 is covered? I want to compare statistics 1 with statistics 2 , so I can find the influence of the time steps.

-Maxim- · March 16, 2016, 10:30

I haven't really worked with those statistics yet but I have the feeling that you are on the wrong path here. I don't think this is the way to go for comparing the influence of time steps. In my understanding, physical values like velocity or y+ should be independent from your time steps. I might be wrong here - it was a long day

But maybe someone else can help out here...

thu_wang · March 17, 2016, 02:52

Well, I will try to make sense of it. Thank you very much.

March 11, 2016, 09:50	How to get two Transient Statistics (Start/Stop Iteration is different) ?	#1
thu_wang New Member Join Date: Mar 2015 Posts: 8 Rep Power: 11	Hi everyone, I defined two kinds of Transient Statistics in CFX-Pre, their Start/Stop Iterations are different. But when I opened the *.res file, I found that there is only one kind of variable.Trnavg. And I don't know the variable.Trnavg in result file is Transient Statistics 1 or Transient Statistics 2. Who can tell me what's wrong with the settings? Thanks in advance.

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March 14, 2016, 05:26		#2
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 415 Rep Power: 12	I would assume it depends on which time step you loaded. So between 2793 and 3200, you have statistics 1. I don't know what happens for the other time steps, though. Why do you even have two statistics defined for the same variables?

March 16, 2016, 10:30		#4
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 415 Rep Power: 12	I haven't really worked with those statistics yet but I have the feeling that you are on the wrong path here. I don't think this is the way to go for comparing the influence of time steps. In my understanding, physical values like velocity or y+ should be independent from your time steps. I might be wrong here - it was a long day But maybe someone else can help out here...

March 17, 2016, 02:52		#5
thu_wang New Member Join Date: Mar 2015 Posts: 8 Rep Power: 11	Well, I will try to make sense of it. Thank you very much.