CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Native Meshers: snappyHexMesh and Others (http://www.cfd-online.com/Forums/openfoam-meshing-snappyhexmesh/)
-   -   nCellsBetweenLevels problem (http://www.cfd-online.com/Forums/openfoam-meshing-snappyhexmesh/115360-ncellsbetweenlevels-problem.html)

laurent98 March 28, 2013 20:39

nCellsBetweenLevels problem
 
hello Foamers,
i want to mesh a air-foil in 2d, i specify nCellsBetweenLevels 9 but SHM doesn't do it...
i can't find the reason, any ideas ???

laurent98 April 9, 2013 01:08

1 Attachment(s)
hi to all,
i have found the problem, it seems that SHM does'nt like non cubic cells! my blockmesh wasn't thick enough.
then, i play a little with featureAngle to obtain Layers... difficult in 3D and quiet stupid because the mesh will be extrude for 2D solving. so i try this trick
make a first SHM with only castelaned true
then extrude
then a second SHM to snap and add layer
here the shell script;

#!/bin/sh
cd ${0%/*} || exit 1 # run from this directory

# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions


# Make 3D mesh only castellated slab of cells.
cd wingMotion_snappyHexMesh1
runApplication blockMesh
cp system/snappyHexMeshDict_init system/snappyHexMeshDict;
runApplication snappyHexMesh; #-overwrite
cp system/snappyHexMeshDict2 system/snappyHexMeshDict
runApplication extrudeMesh
rm log.snappyHexMesh;
rm -r 1

runApplication snappyHexMesh;

# Make a 2D mesh by extruding a patch and solve to steady state.
#cd ../wingMotion2D_simpleFoam1
#runApplication extrudeMesh
#runApplication createPatch -overwrite
#runApplication simpleFoam




# ----------------------------------------------------------------- end-of-file




my problem now is that simpleFoam doesn t work well because a "empty group" appear ....
to learn OF i fill that a lot of perseverance is needed... any help will be very welcome...
LL

laurent98 April 11, 2013 19:51

solved
 
Hi
I send that just for information in case of someone got the same problem.
I just pass from OF 2.1 to 2.2
and to solve the problem i had just to change "mirror" to "empty" into the include files
lost of fun, with OF !!! LL


All times are GMT -4. The time now is 11:42.