Help needed for meshing the following geometry...

eers · June 23, 2009, 16:38

Hi all

I am bit new to gambit n i need to do meshing for the following component as much refined as possible..I tried to do submap meshing by specifying vortex type but couldn't succeed..please suggest me for nice mesh...

eers

xdanielx · June 24, 2009, 00:20

i would split the geometry in several connected rectangels. each of these newly generated rectangles can be meshed with the mapped scheme in gambit. i think this should work for your geometry.

good luck

eers · June 24, 2009, 14:31

@xdanielx

thank u for u r suggestion..but i doubt can we split with respect to vortices ? 'coz they are not connected by edges, right!!

xdanielx · June 25, 2009, 01:34

i am not sure if i understand what you mean.

at the moment you should have just one face in your gambit model. this one face should be split with the split face command. I would use the option split with "Faces (Real)" and the option "connected" enabled. Hope this helps.

mettler · June 25, 2009, 08:16

Did you mesh the edges first? What is wrong with the mesh that you show? If you mesh the edges first and then mesh the face it might give you what you are looking for. You can try different counts on the edges too.

eers · June 25, 2009, 15:33

thanx xdanielx & nettler...I did the way u said but it's coming out to be with lot many skewed elements...The resulting mesh is given below..

eers

harishg · June 25, 2009, 18:47

Is it mandatory that you need to use block structured meshes for your domain? You can try using unstructured/hybrid meshes otherwise. It might be a bit of trial and error to get good block structured meshes for the geometry as there are many sharp corners.

lenvoi · June 25, 2009, 23:01

I think you can try split your face into several rectangle faces, then generate hexa mesh one by one. Hope it works for you...

xdanielx · June 26, 2009, 00:13

i would try to seperate the geometry as shown in the attachment. this is just a first shot to play around and there are different approaches as stated by others...
good luck

eers · June 26, 2009, 15:06

@xdanielx & others

Thank you for u r help..I could finally do a fine meshing without any skew elements by dividing the geometry in to many quadraleterals..

eers · June 26, 2009, 17:02

As i divided the geometry, i have left with inner edges which makes an error "continuum entity fluid path doesn't contain any valid entity and is not written"..I 'll appreciate for your help...

Regards

eers

eers · June 29, 2009, 15:29

As i divided the geometry, i have left with inner edges which makes an error "continuum entity fluid path doesn't contain any valid entity and is not written"..I 'll appreciate for your help...

Regards

eers

June 23, 2009, 16:38	Help needed for meshing the following geometry...	#1
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	Hi all I am bit new to gambit n i need to do meshing for the following component as much refined as possible..I tried to do submap meshing by specifying vortex type but couldn't succeed..please suggest me for nice mesh... eers Last edited by eers; July 8, 2009 at 14:23.

June 25, 2009, 15:33		#6
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	thanx xdanielx & nettler...I did the way u said but it's coming out to be with lot many skewed elements...The resulting mesh is given below.. eers Last edited by eers; July 8, 2009 at 14:23.

June 26, 2009, 17:02		#11
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	As i divided the geometry, i have left with inner edges which makes an error "continuum entity fluid path doesn't contain any valid entity and is not written"..I 'll appreciate for your help... Regards eers Last edited by eers; June 29, 2009 at 15:28.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Importing CAD geometry and Editing edges to match	Ahmed	CFX	15	March 21, 2016 12:39
[snappyHexMesh] SnappyHexMesh meshes inside and outside of an STL geometry	villier	OpenFOAM Meshing & Mesh Conversion	17	June 15, 2010 19:51
vitual _ real	deneb	FLUENT	3	January 22, 2007 04:31
Consultant needed to optimize an oblique diffuser.	Paul	Main CFD Forum	0	March 24, 2004 16:59
Input Geometry from Ideas to Gambit	Knick	FLUENT	2	December 11, 2002 03:59

June 24, 2009, 00:20		#2
xdanielx New Member Daniel Langmayr Join Date: Mar 2009 Posts: 15 Rep Power: 17	i would split the geometry in several connected rectangels. each of these newly generated rectangles can be meshed with the mapped scheme in gambit. i think this should work for your geometry. good luck

June 24, 2009, 14:31		#3
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	@xdanielx thank u for u r suggestion..but i doubt can we split with respect to vortices ? 'coz they are not connected by edges, right!!

June 25, 2009, 01:34		#4
xdanielx New Member Daniel Langmayr Join Date: Mar 2009 Posts: 15 Rep Power: 17	i am not sure if i understand what you mean. at the moment you should have just one face in your gambit model. this one face should be split with the split face command. I would use the option split with "Faces (Real)" and the option "connected" enabled. Hope this helps.

June 25, 2009, 08:16		#5
mettler Senior Member Andrew Join Date: Mar 2009 Location: Washington, DC Posts: 209 Rep Power: 18	Did you mesh the edges first? What is wrong with the mesh that you show? If you mesh the edges first and then mesh the face it might give you what you are looking for. You can try different counts on the edges too.

June 25, 2009, 18:47		#7
harishg Senior Member N/A Join Date: Mar 2009 Posts: 189 Rep Power: 17	Is it mandatory that you need to use block structured meshes for your domain? You can try using unstructured/hybrid meshes otherwise. It might be a bit of trial and error to get good block structured meshes for the geometry as there are many sharp corners.

June 25, 2009, 23:01		#8
lenvoi New Member Raymond Liu Join Date: Jun 2009 Posts: 2 Blog Entries: 1 Rep Power: 0	I think you can try split your face into several rectangle faces, then generate hexa mesh one by one. Hope it works for you...

June 26, 2009, 15:06		#10
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	@xdanielx & others Thank you for u r help..I could finally do a fine meshing without any skew elements by dividing the geometry in to many quadraleterals..

June 29, 2009, 15:29		#12
eers New Member eers Join Date: Jun 2009 Posts: 27 Rep Power: 16	As i divided the geometry, i have left with inner edges which makes an error "continuum entity fluid path doesn't contain any valid entity and is not written"..I 'll appreciate for your help... Regards eers