CFD Online Discussion Forums

Personal Notes - postProcessing

Posted June 22, 2018 at 23:15 by student666

Tags functions, post processing, sampling

OF 5.x-dev

Function to be added on controlDict, maybe there's a postProcess utility, but I haven't find any.

This is for sampling fields on surfaces as stl

Code:

        pressureAverageOnTriSurface_left //name of the folder where .dat is saved
        {
            name            left;   //dumb entry ??
            
            type            surfaceFieldValue;
            libs            ("libfieldFunctionObjects.so");

...

student666

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Lognormal Distribution for Particle Size in OpenFOAM

Posted May 1, 2018 at 11:13 by Mehar

Tags dpmfoam, lognormal, mppic, openfoam

This is for future reference, if anyone wants to use lognormal particle distribution in OpenFoam.
1) Generate PDF from following formula

Here mu and sigma are the geometric mean and standard deviation of the particle size distribution
Here is an example plot of the lognormal distribution with mean 1 and standard deviations of 1.8, and 3. You can first re-create lognormal distribution with these parameters...

Attached Files

	logNormal Pdf.xlsx (36.0 KB, 17 views)
	kinematicCloudProperties.txt (5.2 KB, 29 views)

Mehar

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Posted in OpenFoam

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Wall function usage

Posted April 2, 2018 at 22:34 by zacwhee

about wallfunction usage

Quote:

Originally Posted by G_German

Since the documentation on the use of wall functions (or BCs for turbulence models in general) in OpenFOAM is rather small I tried to write up a little summary of what is posted in the internet (for kEpsilon, kOmegaSST & SA).
As this may also be interesting to other people and I would be interested in feedback, please find the summary below:

Basics:
If the grid near the wall is fine enough (~y+<1 everywhere and at least 4-5 nodes

...

zacwhee

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Exporting two different meshes simultaneously from salome to openfoam

Posted March 16, 2018 at 14:13 by p@nkaj

Hello,
This is my first post.

I want to export two different meshes at a time from salome 8.3.0 to (OpenFOAM-in-Box-18.02-r638).
I don't want to compound those meshes.
I used med and cgns formats to export, but failed.
When I exported using med, I was unable to convert it into foam file. I tried using ideasUnvToFoam <File_name>.med.
The polymesh folder was created, but all the files i.e. boundary, points, faces, neighbour and owner were empty....

p@nkaj

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cfMesh my steps

Posted March 2, 2018 at 23:48 by student666
Updated March 10, 2018 at 01:23 by student666

fms file creation

Code:

surfaceToFMS file.stl

extraction of edges from stl file

Code:

surfaceFeatureEdges file.stl file.fms -angle 30

This is to visualize with paraview

Code:

FMSToSurface -exportFeatureEdges file.fms fileEdge.fms

#several steps for improving mesh quality

Code:

cartesianMesh.exe
checkMesh.exe >> log.Mesh1
improveMeshQuality.exe
checkMesh.exe >> log.Mesh1
improveMeshQuality.exe
checkMesh.exe >> log.Mesh1
improveSymmetryPlanes.exe

...

student666

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