[samAppl]

It was simple, it was clear, you could specify a line or a surface in sampleDict to sample values and integrate or average or do whatever else you wanted. I must be going blind because the new user guide says nothing about how you can define a line to integrate a field over with the postProcess utility. It tells you how to specify a patch for calculations, but not how to define a line or a surface, this is ridiculous.

[RobertHB]

How about this page: https://cfd.direct/openfoam/user-gui...hs-monitoring/ , is this what you are looking for? To sample a surface you use the surfaces dictionary and multiple graphs can be done with the graph dict.

[samAppl]

Ah, you're right I missed that. Thank you.
Another question, what about flow rate calculation? The user guide introduces function objects that can calculate the flow rate, but those all require a patch name, what if you want to calculate the flow rate through a random surface? Is there a way simpler than sampling the values on that surface and exporting to a software like Matlab?

[mortezahdr]

I am wondering if it is possible to interpolate data on a sample surface to map it on a rectangular 2D grid.

Let us say I have a case with an unstructured grid and I get data on a slice at x=a. Since I want to do some math such as FFT on that group of data on that slice, I need to map data on a structured, ordered m*n grid. I it possible to perform such a task by openfoam or paraview?

Thanks in advance.

[Bodo1993]

Hi,
I am using openFoam V6. Kindly, can we still use sampleDict for V6?
I tried to run PostProcess -func sampleDict -latestTime, I get empty directories.
I would appreciate any assistance. Thanks

[Bodo1993]

Hi,
Does that mean we cannot use sampleDic for openfoam v6?

[HPE]

`sample` functionalities can be used in OpenFOAM as before. I think the dictionary examples were just forgotten.

Put your `sampleDict`, or any file containing your `sample` setup, and try to run `postProcess -dict system/sampleDict -latestTime`, or if you have the sample setup in your `controlDict:functions`, just `postProcess -latestTime` will execute the `sample` dictionary.

[kerim]

Dear all,
I have some kind of sampling problem when I use cloud type. I need to sample mag(U) at several points and followed to the sampling tutorial https://www.cfd.at/sites/default/fil...leFourteen.pdf. After execution of the command - postProcess -func sample –latestTime, I got an error - Unknown sample set type cloud. Please help me to clarify this issue. Where I have made mistake?
Please see the attached file for more information.
I am using OpenFOAM7.0 installed on Ubuntu 18.04 LTS.
Kerim

[CFD-HSNR]

Originally Posted by kerim

Dear all,
I have some kind of sampling problem when I use cloud type. I need to sample mag(U) at several points and followed to the sampling tutorial https://www.cfd.at/sites/default/fil...leFourteen.pdf. After execution of the command - postProcess -func sample –latestTime, I got an error - Unknown sample set type cloud. Please help me to clarify this issue. Where I have made mistake?
Please see the attached file for more information.
I am using OpenFOAM7.0 installed on Ubuntu 18.04 LTS.
Kerim

Hi kerim,

Have you found a solution? I have exactly the same problem right now.

[kerim]

Originally Posted by CFD-HSNR

Hi kerim,

Have you found a solution? I have exactly the same problem right now.

Please look at this file - points.H

You can find it in the OpenFoam installation folder:

openfoam/src/sampling/sampledSet/points.H
Kerim.


PS. Please have a critical look at User Guide. There are some wrong statements!