Merging history files with restart case

shahidkhan · February 11, 2022, 23:56

I have a doubt regarding the history files generated-
Suppose I am running a case from iteration=0 to iteration=2000. I get a history.dat file and I save it. After that I run my case again using the restart_flow.dat file. Again I get a new history file starting from iteration=0 which is essentially iteration=2001. Now I get two history files.
How can I merge these two files so that I can get only one convergence plot?
Can we do this in SU2 or it can be done in post-processing software?

Note- I am using tecplot for post-processing.

bigfootedrockmidget · February 12, 2022, 08:22

Hi! It's currently not possible from within SU2 to say that the new history file should append to the existing history file. You have to write to different history files, and then you can concatenate them afterwards by getting the header of the first file and adding the body of all files and writing to a concatenated history file simply by using:

Code:

(head -1 history_00001.csv ; tail -n +2 -q history*.csv ) > history_all.txt

shahidkhan · February 13, 2022, 23:48

Really thank you.

February 11, 2022, 23:56	Merging history files with restart case	#1
shahidkhan Member Shahid Khan Join Date: Jan 2020 Posts: 35 Rep Power: 6	I have a doubt regarding the history files generated- Suppose I am running a case from iteration=0 to iteration=2000. I get a history.dat file and I save it. After that I run my case again using the restart_flow.dat file. Again I get a new history file starting from iteration=0 which is essentially iteration=2001. Now I get two history files. How can I merge these two files so that I can get only one convergence plot? Can we do this in SU2 or it can be done in post-processing software? Note- I am using tecplot for post-processing.

February 12, 2022, 08:22		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 504 Rep Power: 17	Hi! It's currently not possible from within SU2 to say that the new history file should append to the existing history file. You have to write to different history files, and then you can concatenate them afterwards by getting the header of the first file and adding the body of all files and writing to a concatenated history file simply by using: Code: (head -1 history_00001.csv ; tail -n +2 -q history*.csv ) > history_all.txt PENGGEGE777 likes this.

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February 13, 2022, 23:48		#3
shahidkhan Member Shahid Khan Join Date: Jan 2020 Posts: 35 Rep Power: 6	Really thank you.