Reading/exporting faceSource data
 

Hi there,

I have run a transient case with v1.7.1, exporting wall-surface results with the function "faceSource" in the controlDict. This function created the surface results for every timestep under folder "processor0" (parallel run) without any problems.

However, I can't find the way to export these results to other formats for check-up. I have 2 questions:
1) faceSource seems to export the data corresponding to all the processors under "processor0", not just the data corresponding to this processor. Is this correct?
2) I am not able to convert the surface data as it does not export any variables (foamToVTK, foamToEnsight). Not even exporting with the "global" constant folder (not the processor0/constant). Have you tried this in the past?

Thanks.

Hi Roger,

I'm new to openFoam but have just been experimenting with parallel runs myself.
Could you reconstruct the case from its parallel components using reconstructPar, open with Paraview and then plot/select data on the face and export as a csv file? That should give you data that is at least able to be manipulated easily.
Sorry if that wasn't much help.

Dom.

Hello Dom,

That is the thing, it seems to store all the faceSource data under processor0. If I check the number of lines for each file under processor0/timestepxyz, it shows the same lines as elements for those parts under constant/polyMesh. Hence I assume it is the complete data, not just the partitioned portion for processor0.

What I am doing now is to export the data as surface from constrolDict, not as faceSource. This creates much bigger files due to the XYZ being saved for every timestep. I can't use it to convert to EnSight or VTK, but at least it is easy to handle directly.

Thanks for the help anyway.

help me
 

Hi Ronger,

I am new to OF. In my simulaiton I need to export force on a wall suface during every time step. I do not know as how to do this. As I understand that you have been successful in exporting wall-surface results, I would like to seek your help in this regard. Could you ellaborate as how to export wall-surface results ? or could you provide me with your ControlDict file so that I can learn from it.

Thank you so much for your post in OF
ksv

Hello Ksv,
I know openFoam can export variable data at the walls, as well as Cd/Cl.
I only know how to export variable data. you can do it adding following information to the controlDict, under functions{

functions
{
wallPressure
{
typesurfaces;
functionObjectLibs ("libsampling.so");
outputControltimeStep;
outputInterval 1;
surfaceFormatraw;
fields ( p );

surfaces
(
part 1
{
typepatch;
patchNamepartname1;
triangulate false;
}
…
partN
{
typepatch;
patchNamepartnameN;
triangulate false;
}
);
}
}

It seems the tabs are been deleted in previous post. Sorry about that.

Thanks Roger !
 

Hi Roger,

Thanks for your advice.

Regards
ksv