CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   how to write and see last iteration flow properties at folders? (http://www.cfd-online.com/Forums/openfoam-solving/112059-how-write-see-last-iteration-flow-properties-folders.html)

immortality January 21, 2013 10:45

how to write and see last iteration flow properties at folders?
 
i want to know values of properties at for example 3 last iterations to figure out what values at what points are diverged.how to do that?

asoltoon January 24, 2013 03:12

Hi,
You should change the writeControl to timeStep and writeInterval to 1. So the results will be written in each timeStep and you can see your variable matrices in your directory folder.

Cheers
Ali

immortality January 24, 2013 06:11

hi ali
Thanks for good hint.
But i should do it at times near the occurance of diverging otherwise folders will grow too many.
Do you know how i can find the location of point that a number in the column of results refer to ?

asoltoon January 24, 2013 06:41

could you explain what you mean more specifically? I didn't understad precisely what you said!

immortality January 24, 2013 11:31

after the run when a divergence took place i want to know what value at what cell maked the problem.at each of folders under each property like p or T there is a column of cell values.how can i figure out a false result(like T=20Kelvin thats very low and is incorrect) is relevant to which cell?

asoltoon January 24, 2013 12:33

By my current knowledge about Openfoam you have two choices:
1- tracing the point with false results visually in paraFoam and the using Probe Location filter to get the coordinates of the point.
2- using the disscussion done in the 1st four posts of the following thread to get the point's coordinates(recommended):
http://www.cfd-online.com/Forums/ope...-openfoam.html

Regards,
Ali

immortality January 24, 2013 13:16

thank you.could you tell me how to use the probe location filter?thanks.

immortality January 26, 2013 09:19

whats the stages should be done for probe location filter?

asoltoon January 27, 2013 07:49

It is not so complicated, just follow the instruction below:


The probe filter can be used to query a dataset for point or cell data.
Options for the probe filter are:
  • Show Point button is used to show where the center of the sphere is for generating the probe points.
  • Center on bounds will place the sphere center at the center of the dataset's bounds.
  • The sphere center can either be set in the properties tab of the object inspector or in the 3D view with the mouse cursor. To choose a new point in the 3D view window, press P and then click on the desired point. Note that the Show Point option must be selected in order to activate the point widget.
Regards, Ali


All times are GMT -4. The time now is 21:13.