Space-time post processing

Simbelmynë · February 16, 2016, 08:15

Hey,

How would you present data from a simulation where the time-step is not constant in space? Is it even possible to have any meaningful information other than the steady-state solution?

Reeb · February 16, 2016, 14:41

Hi,

Have you considered to use average values over a certain time interval?

Best regards,
Marcus

Simbelmynë · February 16, 2016, 15:07

Quote:

Originally Posted by Reeb

Hi,

Have you considered to use average values over a certain time interval?

Best regards,
Marcus

Hej Marcus, thank you for your input. The answer is no I have not. The problem is that time is progressing faster in some parts of the domain. Normally this is solved by some kind of book-keeping procedure, performing several time-steps in the regions where time progresses slower. With that kind of procedure the global time would be the same and the results would be more tangible (at least for me

). I don't see how time-averaging would help unless I use the book-keeping procedure. The time-average values would not be of the same global time, but perhaps that is not a problem?

Reeb · February 18, 2016, 03:04

Hi,

I thought that you could take the time average for the results for lets say 0-5 s global time over the whole domain. The only difference would then be that you have more solutions to take average of in the domain that has smaller time steps and fewer in that with longer time steps. If this does not work I guess the book-keeping procedure is your best option.

Best regards,
Marcus

February 16, 2016, 08:15	Space-time post processing	#1
Simbelmynë Senior Member Join Date: May 2012 Posts: 546 Rep Power: 15	Hey, How would you present data from a simulation where the time-step is not constant in space? Is it even possible to have any meaningful information other than the steady-state solution?

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February 16, 2016, 14:41		#2
Reeb New Member Marcus Timgren Join Date: Feb 2016 Location: Sweden Posts: 11 Rep Power: 10	Hi, Have you considered to use average values over a certain time interval? Best regards, Marcus

February 18, 2016, 03:04		#4
Reeb New Member Marcus Timgren Join Date: Feb 2016 Location: Sweden Posts: 11 Rep Power: 10	Hi, I thought that you could take the time average for the results for lets say 0-5 s global time over the whole domain. The only difference would then be that you have more solutions to take average of in the domain that has smaller time steps and fewer in that with longer time steps. If this does not work I guess the book-keeping procedure is your best option. Best regards, Marcus