[booz]

Hello,

in my case I want to integrate over the patch "outlet".

Any idea how I can do this with openFoam?

Thanks and best regards
Khaled

[kbr]

Hi Khaled,

try the utility "patchIntegrate":

patchIntegrate <root> <case> <fieldname> <patchname>.

Kerstin

[booz]

Hi Kerstin,

first thanks. I tried this, but it doesn´t work.

My case is "caseGeometrie", the fieldname is "p" for pressure and the patchname is "outlet".

So i triesd with

pathchIntegrate . caseGeometrie.p.outlet

But it output an error message.

Regards,
Khaled

[kbr]

Hi Khaled,

just try

patchIntegrate 'name of the directory your case is located' caseGeometrie p outlet

If it doesn't work put the error message in your thread, please.

Kerstin

[kbr]

Hi Khaled,

just try

patchIntegrate 'name of the directory your case is located' caseGeometrie p outlet

If it doesn't work put the error message in your thread, please.

Kerstin

[booz]

Hi Kerstin

well here is the error message:


:~/OpenFOAM/studi8-1.4.1/tutorials$ patchIntegrate object caseGeomtrie p outlet
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : patchIntegrate object caseGeomtrie p outlet
Date : Feb 16 2009
Time : 10:19:27
Host : fed-lin44
PID : 12011
Root : object
Case : caseGeomtrie
Nprocs : 1


--> FOAM FATAL ERROR : patchIntegrate: Cannot open case directory "object/caseGeomtrie"


FOAM exiting

Khaled

[kbr]

Hi Khaled,

maybe there's only a mistake in writing, isn't it? Have a look on your case name: 'caseGeomtrie'

Kerstin

[booz]

Oh, thanks a lot. That was the mistake!

Now it is running.

Regards,
Khaled

[nandiganavishal]

Hello,

I have a square geometry and would like to calculate the average velocity across the channel at different points along my channel.. Hence I would to integrate the velocity across the channel to calculate the average values.. May I know how exactly we should do this..

Kindly do the needful

Regards

Vishal Nandigana

[dpermacaroni]

Hello everyone,

Situation: I'm simulating a Fluidic oscilaltor (see image in attachment taken from google) with pimpleFoam.
For pre-processing, I used "icem cfd" to make the geometry, export it as a fluent-file and then imported it to openFoam.

The most important property I need to analize is the frequency of the oscillation. For that, I thought I could plot de integration of the velocity field over the time on each "output" using patchIntegrate.

Problem: I defined the two outlets of the oscillator (right side of image) as one patch named "output" in icem. So when I use patchIntegrate, it integrates the velocity over both outlets.

Posibilities: I thought of 3, though I'm not sure if they can be implemented. If you think of more, they are very welcome!

1. Define a region when using patchIntegrate. Does the patch has to be devided in regions beforehand? How to define the "regions"?

2. Use a tool from paraview to plot the massflow through a part of the "outlet"-patch. How is the tool called?

3. Extract the cell velocity-data from the time-directories of the desired region "outlet" and make the integration mannually. (no clue how to do that)

Thanks a lot in advance for your help

[sisetrun]

Hey dpermacaroni,

you can try the to create a patch with the createPatchDict

https://github.com/OpenFOAM/OpenFOAM...reatePatchDict