[OpenFOAM] Obtain Scalar field data in a dat file.

ashish.vinayak · March 25, 2015, 05:30

Hi,
I'm trying to find a way to get all the plot data from the plot over line function into a .dat file.
Here's what I've done in detail.

At a location in the pipe, I have used the plot over line function to get a plot of pressure vs pipe length. I've attached a screenshot of the line. I would like to get the values of pressure on this line in a .dat file or any file which can be manipulated. Is there a way to this? I've been looking all over!

Thank you

Screenshot from 2015-03-25 11:27:33.jpg

blacksquirrel · March 25, 2015, 07:52

Hi Ashish,

There are different ways to obtain your .dat file.
E.g. in paraview: You make your plot over line. Now take a look in the menu File/Save Data (or Ctrl S) that will save you selected data (the line) in a .csv file., which you can open with a text-editor or spreadsheet.
Note, this will probably give you interpolated data.

Another possibility would be the sample utility from OpenFoam: (http://www.openfoam.org/docs/user/sample.php). Here you can define your line as well, and write the desired fields into a dat file. It is a good tool, so you should take a look into this. It allows especially to get the "real" cell values and not interpolated data.

Regards
Squirrel

March 25, 2015, 05:30	Obtain Scalar field data in a dat file.	#1
ashish.vinayak Member Ashish Vinayak Join Date: Mar 2015 Location: Wuppertal, Germany Posts: 50 Rep Power: 11	Hi, I'm trying to find a way to get all the plot data from the plot over line function into a .dat file. Here's what I've done in detail. At a location in the pipe, I have used the plot over line function to get a plot of pressure vs pipe length. I've attached a screenshot of the line. I would like to get the values of pressure on this line in a .dat file or any file which can be manipulated. Is there a way to this? I've been looking all over! Thank you Screenshot from 2015-03-25 11:27:33.jpg

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March 25, 2015, 07:52		#2
blacksquirrel Member Join Date: Jun 2011 Posts: 53 Rep Power: 14	Hi Ashish, There are different ways to obtain your .dat file. E.g. in paraview: You make your plot over line. Now take a look in the menu File/Save Data (or Ctrl S) that will save you selected data (the line) in a .csv file., which you can open with a text-editor or spreadsheet. Note, this will probably give you interpolated data. Another possibility would be the sample utility from OpenFoam: (http://www.openfoam.org/docs/user/sample.php). Here you can define your line as well, and write the desired fields into a dat file. It is a good tool, so you should take a look into this. It allows especially to get the "real" cell values and not interpolated data. Regards Squirrel