CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[GAMBIT] Stairstep meshing in Gambit

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   November 14, 2012, 10:45
Default
  #21
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
yes i want to.
zaynah04 is offline   Reply With Quote

Old   November 15, 2012, 02:51
Default
  #22
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
only one size function................

Sans titre1.jpg Sans titre2.jpg

The only problem is between faces 133 & 139 (a combination of split and connect should fix the issue)
Sans titre3.jpg
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 15, 2012, 05:11
Default
  #23
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
hi..
did as you told and got that error
"mesh of face.334 contain 1 highly skewed element"
zaynah04 is offline   Reply With Quote

Old   November 15, 2012, 05:14
Default
  #24
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
what are your parameters for your size fonction?
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 15, 2012, 05:21
Default
  #25
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
tet/hybrid, tgrid and 10
zaynah04 is offline   Reply With Quote

Old   November 15, 2012, 05:25
Default
  #26
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
Quote:
Originally Posted by -mAx- View Post
what are your parameters for your size fonction?
http://aerojet.engr.ucdavis.edu/gamb...ommands_create

I used tet/Hexcore
http://aerojet.engr.ucdavis.edu/gamb...chemes_hexcore
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 15, 2012, 05:35
Default
  #27
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
sorry i misread.

0.03
1.3
1
zaynah04 is offline   Reply With Quote

Old   November 15, 2012, 05:51
Default
  #28
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
I used
1
1.2
20
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 26, 2012, 06:05
Default
  #29
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
hi
did you mesh the faces first?
and my PC is quad core with 16 Gb of ram..i still can not mesh it.
zaynah04 is offline   Reply With Quote

Old   November 26, 2012, 06:08
Default
  #30
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
If I meshed the surface then it is only building's surfaces.
What kind of error do you receive?
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 26, 2012, 06:13
Default
  #31
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
volume cannt be meshed without faces sucessfully meshed
zaynah04 is offline   Reply With Quote

Old   November 26, 2012, 07:04
Default
  #32
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
then you have skewed cells for sure, check where I pointed out (post #22)
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   November 26, 2012, 10:08
Default
  #33
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
i did of course as you recommended for in post#22...

still it says i have skewed elements...
sometimes it meshes then all freeze and i have to start again..
zaynah04 is offline   Reply With Quote

Old   November 26, 2012, 10:28
Default
  #34
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
go to examine mesh and check where are those cells.
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   December 6, 2012, 06:38
Default
  #35
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
dear max,

after i split n connect faces. i then mesh the faces using tri pave

then i mesh the volume.
attachd is the error i found.

can you please enlighten me ?

cheers
Attached Images
File Type: jpg Untitled.jpg (65.5 KB, 5 views)
zaynah04 is offline   Reply With Quote

Old   December 6, 2012, 06:57
Default
  #36
Senior Member
 
zaynah K.
Join Date: Jun 2012
Location: Mauritius
Posts: 138
Rep Power: 5
zaynah04 is on a distinguished road
hi
what to do when we have highly skewed elements? it say my mesh has 63 highly skewed elements...;(

thanks
zaynah04 is offline   Reply With Quote

Old   December 6, 2012, 07:54
Default
  #37
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
fix those skewed elements.
First, check where they are, and try to find any topology which is responsible for the skewness
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   February 20, 2013, 07:37
Default Gambit size function problem!
  #38
Senior Member
 
rkhr
Join Date: May 2011
Posts: 211
Rep Power: 7
Kanarya is on a distinguished road
Hi,
I am trying to use two size function together but it seems doesnt work. my geometry is 3D I would like to have dense mesh y+=1 near the wall and at the same time to have coarser mesh in flow direction. it it seems like I am getting dense mesh near the wall but I got same mesh size in direction of flow. the other problem is gambit giving me problem with the memory!
thanks in advance!
Kanarya is offline   Reply With Quote

Old   February 20, 2013, 09:14
Default
  #39
Super Moderator
 
-mAx-'s Avatar
 
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
Posts: 2,972
Rep Power: 30
-mAx- will become famous soon enough
what parameters did you give for size function?
__________________
In memory of my friend Hervé: CFD engineer & freerider
-mAx- is offline   Reply With Quote

Old   February 20, 2013, 10:01
Default
  #40
Senior Member
 
rkhr
Join Date: May 2011
Posts: 211
Rep Power: 7
Kanarya is on a distinguished road
Quote:
Originally Posted by -mAx- View Post
what parameters did you give for size function?
Hi max,
thanks for quick answer!
my geometry is 170 1500 190 in mm. first size function is 1 to 3 with growthrate 1.2. and y direction 3 to 8 with same growthrate.

thanks in advance!!!
Kanarya is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[ANSYS Meshing] ANSYS Meshing vs GAMBIT aerospain ANSYS Meshing & Geometry 0 September 28, 2011 06:05
Gambit meshing error jx FLUENT 11 May 26, 2009 10:35
GAMBIT problem with 3D Boundary Layer when meshing Anthony Haroutunian FLUENT 2 March 26, 2008 03:02
meshing a fan using gambit tony FLUENT 1 February 15, 2008 01:28
Gambit: too long meshing time! delsolman FLUENT 1 January 29, 2008 20:06


All times are GMT -4. The time now is 03:09.