CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   ANSYS Meshing & Geometry (http://www.cfd-online.com/Forums/ansys-meshing/)
-   -   Problem in meshing (http://www.cfd-online.com/Forums/ansys-meshing/63551-problem-meshing.html)

sophie-l April 12, 2009 15:20

Problem in meshing
 
hello everybody,
i have 2 cylinders: the first is the big one and it isvertical and the other is small and tangent to the first.
i splited the 2 volumes, than meshed the big one with hexa. When i am trying to mesh the small one (with tetra) a message appears:
check the skewness of your face meshes and make suree the mesh face sizes are not too large in areas of small gaps.
what should i do?
thanks for ure help

sophie-l April 13, 2009 11:10

someone told me that i must do non conform meshing....what is this?

-mAx- April 14, 2009 01:59

Your mesh with tetra-hexcore at the junction.
you may have hexa mesh at the biggest junction, but not at the smallest because of the tangential edges ( I assume)
********
volume create height 1.7145 radius1 0.04445 radius3 0.04445 offset 0 0 \
0.85725 zaxis frustum
volume create height 0.1 radius1 0.015875 radius3 0.015875 offset 0 0 0.05 \
zaxis frustum
volume move "volume.2" dangle -63 vector 0 1 0 origin 0 0 0
volume move "volume.2" offset 0 0 1.5621
volume move "volume.2" offset 0 0.028575 0
volume create height 0.3 radius1 0.0381 radius3 0.0381 offset 0 0 0.15 zaxis frustum
volume move "volume.3" dangle -90 vector 1 0 0 origin 0 0 0
volume move "volume.3" offset 0 0 0.1016
default set "GRAPHICS.GENERAL.CONNECTIVITY_BASED_COLORING" numeric 1
default set "GRAPHICS.GENERAL.CONNECTIVITY_BASED_COLORING" numeric 0
volume unite volumes "volume.1" "volume.3"
volume unite volumes "volume.1" "volume.2"
vertex summarize "vertex.7"
face cmove "face.1" multiple 1 offset 0 0 0.5
face move "face.11" offset 0 0 -0.2
face move "face.11" offset 0 0 -0.1
volume split "volume.1" faces "face.11" connected
face cmove "face.3" multiple 1 offset 0 0 -0.1
face move "face.13" offset 0 0 -0.1
volume split "volume.1" faces "face.13" connected
face cmove "face.9" multiple 1 offset 0 -0.2 0
volume split "volume.2" faces "face.15" connected
undo begingroup
blayer create first 0.001 growth 1.2 total 0.005368 rows 4 transition 1 trows \
0 uniform
blayer attach "b_layer.1" volume "volume.2" "volume.2" "volume.4" "volume.1" \
"volume.3" "volume.3" face "face.2" "face.16" "face.10" "face.14" "face.12" \
"face.5" add
undo endgroup
face mesh "face.15" pave size 0.01
volume mesh "volume.4" cooper source "face.15" "face.9" size 0.01
face mesh "face.11" pave size 0.01
volume mesh "volume.1" cooper source "face.11" "face.13" size 0.01
sfunction create sourcefaces "face.5" startsize 0.005 growthrate 1.2 \
sizelimit 0.01 attachvolumes "volume.3" fixed
sfunction bgrid attachvolumes "volume.3"
volume mesh "volume.3" hexcore native offsetlayers 3 quadsplit hangingnodes \
size 1
volume mesh "volume.2" hexcore native offsetlayers 3 quadsplit hangingnodes \
size 0.01


All times are GMT -4. The time now is 04:54.