calcFvcGrad output time control

Elham · February 23, 2016, 23:00

Hi,

I want to have gradient of velocity field in each 0.1 sec. I am using calcFvcGrad tool in the controlDict. But it is written in every time step. How can I specify my own time step for writing gradient?

Thanks

fabian_roesler · February 29, 2016, 08:33

Hi

You could choose

Code:

outputControl outputTime;

for the functionObject and use a

Code:

writeInterval of 0.1;

in controlDict.

Cheers

Elham · March 16, 2016, 03:44

Hi,

Can I have the centre of each cell for the corresponding Ug? I want to plot a function of Ug versus the position in flowfield.

Regards

fabian_roesler · March 16, 2016, 03:58

Hi,

The easiest way should be using paraview.
In paraview you an visualize the U gradient and open the spread sheet viewer. There you can see all cells with their index, position and stored field values. This spread sheet view can be stored as cvs data which can afterwards be processed in excel or other tools.

Cheers

Fabian

Elham · March 16, 2016, 22:14

Thanks Fabian,

That's exactly what I want.

Elham · March 16, 2016, 23:28

But I cannot save Ug in csv file. What should I do?

Elham · March 17, 2016, 04:27

Sorry just ignore this message. I mixed up Ug with the eigenvalue.

Elham · March 17, 2016, 04:39

I solved it myself by selecting the boundary meshes as well as internal mesh.

February 23, 2016, 23:00	calcFvcGrad output time control	#1
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	Hi, I want to have gradient of velocity field in each 0.1 sec. I am using calcFvcGrad tool in the controlDict. But it is written in every time step. How can I specify my own time step for writing gradient? Thanks

February 29, 2016, 08:33		#2
fabian_roesler Senior Member Fabian Roesler Join Date: Mar 2009 Location: Germany Posts: 213 Rep Power: 18	Hi You could choose Code: outputControl outputTime; for the functionObject and use a Code: writeInterval of 0.1; in controlDict. Cheers Elham likes this.

March 16, 2016, 03:44	Ug versus position	#3
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	Hi, Can I have the centre of each cell for the corresponding Ug? I want to plot a function of Ug versus the position in flowfield. Regards

March 16, 2016, 03:58	paraview with spread sheet view data export	#4
fabian_roesler Senior Member Fabian Roesler Join Date: Mar 2009 Location: Germany Posts: 213 Rep Power: 18	Hi, The easiest way should be using paraview. In paraview you an visualize the U gradient and open the spread sheet viewer. There you can see all cells with their index, position and stored field values. This spread sheet view can be stored as cvs data which can afterwards be processed in excel or other tools. Cheers Fabian

March 16, 2016, 23:28	cannot save Ug in csv file	#6
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	But I cannot save Ug in csv file. What should I do?

March 16, 2016, 22:14		#5
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	Thanks Fabian, That's exactly what I want.

March 17, 2016, 04:27	imaginary part of Ug missing	#7
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	Sorry just ignore this message. I mixed up Ug with the eigenvalue. Last edited by Elham; March 17, 2016 at 04:38. Reason: It was my own mistake. I mixed up Ug with the eigenvalue.

March 17, 2016, 04:39		#8
Elham Senior Member Elham Join Date: Oct 2009 Posts: 184 Rep Power: 17	I solved it myself by selecting the boundary meshes as well as internal mesh.

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