Monitoring points or planes in transient CFX simulations

jwillie2000 · November 5, 2009, 19:22

Hello all,

I am doing CFD simulation with combustion and I want to monitor the pressure in a plane or at a point for a number of time steps. Preferably, I would like the data to be saved in a file. Any help on how this can be done in CFX?

Thanks!

Jimmy

ghorrocks · November 6, 2009, 06:24

Use a monitor point. Then the point can be exported from Solver Manager or even directly extracted if you like.

If you want to set up a whole bunch of monitor points this can be easily done by generating one monitor point and going to the CCL editor to copy the format the generate lots of them.

harerton · May 17, 2011, 11:04

Quote:

Originally Posted by ghorrocks

Use a monitor point. Then the point can be exported from Solver Manager or even directly extracted if you like.

If you want to set up a whole bunch of monitor points this can be easily done by generating one monitor point and going to the CCL editor to copy the format the generate lots of them.

In CFX Pre GUI, if I right click on a monitor on the "output control" object tree, I could duplicate a monitor and then click on the "Edit in command editor" and edit the appropriate parameters. Pretty easy.

But what if I need to insert 100 monitor points? Is there an easy way to achieve that?

Thanks!

ghorrocks · May 17, 2011, 20:13

Get the CCL for a monitor point. Put that in a text editor and write a routine which generates the CCL for 100 points using perl, python, excel (or anything else). Then import the CCL back into Pre and magically you will have zillions of points.

harerton · May 17, 2011, 20:55

Is there any example on using a routine like this (not necessarily to generate monitor points, just so that I see how it is programed)?

The monitors will only be generated when the *.cfx file is converted to a *.def file?

Thanks!

Harerton

ghorrocks · May 18, 2011, 07:04

You can easily do something like this in something as simple as an excel spreadsheet. Type up a spreadsheet using the text you want, you can use fill and formula functions to get the tricky stuff in. Then export it in a text format and you have your own text file generator.

Of course this is more elegant if done in perl, python or one of the millions of languages out there. But if you are not familiar with these languages you will get there quicker in excel.

harerton · May 20, 2011, 17:20

It worked! Thanks!

I copied the commands for a single monitor and with a spreadsheet and a text editor (TextPad) I could generate all my monitors!

November 5, 2009, 19:22	Monitoring points or planes in transient CFX simulations	#1
jwillie2000 Member James Willie Join Date: Mar 2009 Posts: 81 Rep Power: 17	Hello all, I am doing CFD simulation with combustion and I want to monitor the pressure in a plane or at a point for a number of time steps. Preferably, I would like the data to be saved in a file. Any help on how this can be done in CFX? Thanks! Jimmy

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November 6, 2009, 06:24		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Use a monitor point. Then the point can be exported from Solver Manager or even directly extracted if you like. If you want to set up a whole bunch of monitor points this can be easily done by generating one monitor point and going to the CCL editor to copy the format the generate lots of them.

May 17, 2011, 20:13		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Get the CCL for a monitor point. Put that in a text editor and write a routine which generates the CCL for 100 points using perl, python, excel (or anything else). Then import the CCL back into Pre and magically you will have zillions of points.

May 17, 2011, 20:55		#5
harerton New Member Join Date: Jan 2010 Posts: 15 Rep Power: 16	Is there any example on using a routine like this (not necessarily to generate monitor points, just so that I see how it is programed)? The monitors will only be generated when the .cfx file is converted to a .def file? Thanks! Harerton

May 18, 2011, 07:04		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	You can easily do something like this in something as simple as an excel spreadsheet. Type up a spreadsheet using the text you want, you can use fill and formula functions to get the tricky stuff in. Then export it in a text format and you have your own text file generator. Of course this is more elegant if done in perl, python or one of the millions of languages out there. But if you are not familiar with these languages you will get there quicker in excel.

May 20, 2011, 17:20		#7
harerton New Member Join Date: Jan 2010 Posts: 15 Rep Power: 16	It worked! Thanks! I copied the commands for a single monitor and with a spreadsheet and a text editor (TextPad) I could generate all my monitors!