Extract csv.file

Knowledge · December 13, 2020, 16:17

Hi

I want to make some graphs of the data I have obtained in CFX. I want to make a graph that shows the temperature change over time for different simulations. Therefor I want to extract the data time and temperature, how is it possible?

Thank you!

ghorrocks · December 13, 2020, 17:00

Yes. I assume this is a transient simulation. The best way is to define a monitor point with the CEL expression you wish to calculate. Then the solver will output the value for each time step as the simulation progresses. You can get the data from Solver Manager or a command line tool.

If you have already done the simulation you can only get the values of your expression for time steps you have saved a results file for. You can use the function calculator in CFD-Post (or any of several other tools) to calculate it over all the time steps you have results files for.

Knowledge · December 14, 2020, 08:09

Quote:

Originally Posted by ghorrocks

Yes. I assume this is a transient simulation. The best way is to define a monitor point with the CEL expression you wish to calculate. Then the solver will output the value for each time step as the simulation progresses. You can get the data from Solver Manager or a command line tool.

If you have already done the simulation you can only get the values of your expression for time steps you have saved a results file for. You can use the function calculator in CFD-Post (or any of several other tools) to calculate it over all the time steps you have results files for.

Now I am inside the function calculator why does it assume that I want to calculate for pressure?
I can choose Ave, minVal, maxVal and want it to calculate the min, max and average temperature of the fluid not the pressure.

ghorrocks · December 14, 2020, 16:43

...... then change it from pressure to temperature. Isn't that obvious?

Knowledge · December 15, 2020, 04:15

Quote:

Originally Posted by ghorrocks

...... then change it from pressure to temperature. Isn't that obvious?

It is not possible I can show you the picture

pressure.jpg

ghorrocks · December 15, 2020, 06:03

There are extra controls which are not visible on your screen. The scroll bar on the right side will let you see the extra controls.

Your screen must be very low pixel resolution if it has had to be shrunk that much. You should try to run at higher screen resolution and things will be much easier. Have a look at your display settings.

December 13, 2020, 16:17	Extract csv.file	#1
Knowledge Member Sara Join Date: Nov 2020 Posts: 44 Rep Power: 5	Hi I want to make some graphs of the data I have obtained in CFX. I want to make a graph that shows the temperature change over time for different simulations. Therefor I want to extract the data time and temperature, how is it possible? Thank you!

December 13, 2020, 17:00		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,732 Rep Power: 143	Yes. I assume this is a transient simulation. The best way is to define a monitor point with the CEL expression you wish to calculate. Then the solver will output the value for each time step as the simulation progresses. You can get the data from Solver Manager or a command line tool. If you have already done the simulation you can only get the values of your expression for time steps you have saved a results file for. You can use the function calculator in CFD-Post (or any of several other tools) to calculate it over all the time steps you have results files for. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

December 14, 2020, 16:43		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,732 Rep Power: 143	...... then change it from pressure to temperature. Isn't that obvious? __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

December 15, 2020, 06:03		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,732 Rep Power: 143	There are extra controls which are not visible on your screen. The scroll bar on the right side will let you see the extra controls. Your screen must be very low pixel resolution if it has had to be shrunk that much. You should try to run at higher screen resolution and things will be much easier. Have a look at your display settings. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Parts Operations - Extract Volume	cwl	STAR-CCM+	0	November 26, 2020 05:56
Part Operation - Extract Volume	cwl	STAR-CCM+	2	July 23, 2020 22:30
How to extract a defined alpha along a line for dambreak case	shademani	OpenFOAM	0	March 4, 2019 11:37
Big help for a little girl engineer - Extract and Supply air	Dani86	Main CFD Forum	9	April 30, 2018 18:38
extract information from sample during simulation for use	duongquaphim	OpenFOAM Programming & Development	0	January 10, 2011 13:51