# Gambit mesh for cylinder

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

 June 10, 2005, 12:19 Gambit mesh for cylinder #1 Kavia Guest   Posts: n/a dear friends, When I mesh a cylinder with cooper, how can I control the mesh size in the axial direction ? I can not find the option to do so ( I generated the cylinder directly and mesh the two bases)

 June 10, 2005, 12:28 Re: Gambit mesh for cylinder #2 Thiyaga Guest   Posts: n/a Hi, try to mesh the side wall first, then go for bases. regards..

 June 10, 2005, 15:22 Re: Gambit mesh for cylinder #3 anindya Guest   Posts: n/a It depends on how you generate the cylinder. If you creat a cylinder using the 3D cylinder model generation in gambit directly, you have problems meshing in the axial direction. I would suggest that you great a circle with a diameter equal to that of the cylinder. mesh the cirle as you would like it to be. Then protude the cirlce in the direction you want for the length of the cylinder and choose the option (with mesh). In that way you will generate a cylinder that will have both the upper and lower circular surfaces meshed. Now you can also specify the mesh as you like for the length (axial direction).

 June 12, 2005, 22:59 Re: Gambit mesh for cylinder #4 pah Guest   Posts: n/a Hi Kavia and everybody! I made the mesh for cylinder in 2D and 3D, and I think you can make Cylinder 3D by using Extrude from 2D in the direction that you design (in 2D I did not make a full circle, it exists 4 parts). From there, you have some Edges in the axial direction, they can be controled by your distribution. Best regard! pah

 June 13, 2005, 13:00 Re: Gambit mesh for cylinder #5 Kavia Guest   Posts: n/a Thanks for all of your reply. Could you tell me where is the extrude option in the GAMBIT ? I can't find it.

 June 13, 2005, 21:24 Re: Gambit mesh for cylinder #6 zxaar Guest   Posts: n/a well i have been doing lot of meshes for cylinders and to use cooper with the kind of mesh you want you have to cut the cylinder into four parts (the circular section into four 90 deg sectors), now once you have these sectors, describe the distribution on the edges in the direction to creat prism meshes, and just use cooper tool to create the mesh, for smooth cylinders its as easy as 10 mins job

 June 14, 2005, 06:22 Re: Gambit mesh for cylinder #7 pah Guest   Posts: n/a Yes! The Extrude command You can find in the generation Volume button. Or you can contact to me, if I can, I will help you. hungaerospace@yahoo.com pah

 June 19, 2005, 00:31 Re: Gambit mesh for cylinder #8 Mehdi Ghoddosy Guest   Posts: n/a Dear Kavia: I suggest use down-top approach(first creat cap circles). now,you can split the cap circle into for curves at 45 degree.Then change these vertex types to END. THen split the curves on the top and bottom at +90 and -90.Now you have 6 curves. grade the four edges in the top and botom to achive finer mesh at corners. Now you can mesh these circle using map scheme. and then mesh side faces and use cooper scheme to mesh the volume. In this way you can control mesh sizes in all directions. REgards

December 29, 2010, 07:14
Hi anindya
#9
New Member

zeeshan
Join Date: Dec 2010
Posts: 3
Rep Power: 6
Hi,
Plz elaborate how can we mesh in axial direction once we have extruded 2D circular mesh in axial direction.
Thnx and Regards

Quote:
 Originally Posted by anindya ;121441 It depends on how you generate the cylinder. If you creat a cylinder using the 3D cylinder model generation in gambit directly, you have problems meshing in the axial direction. I would suggest that you great a circle with a diameter equal to that of the cylinder. mesh the cirle as you would like it to be. Then protude the cirlce in the direction you want for the length of the cylinder and choose the option (with mesh). In that way you will generate a cylinder that will have both the upper and lower circular surfaces meshed. Now you can also specify the mesh as you like for the length (axial direction).

 January 3, 2011, 02:04 #10 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,031 Rep Power: 31 in Fluent or in Gambit? __________________ In memory of my friend Hervé: CFD engineer & freerider

January 3, 2011, 02:42
meshing this geometry in gambit
#11
New Member

zeeshan
Join Date: Dec 2010
Posts: 3
Rep Power: 6
Hi,
Since last week am stuck in meshing this geometry, its riser of a circulating fluidised bed. The two extruded small pipes are soild inlet and gas-solid outlet. The bottom of riser is gas inlet and top is wall. i want very fine grid near wall.

I have tried following approaches but failed :
a.)unstructured grid, directly meshing using vol. mesh.
b.)Boundary layer (i didn't understood how to apply it ).
c.)Created a circle wid 4 sectors and then meshed them separately but problem is now i have 4 meshes how wud i join them?

Regards
Zeeshan

Quote:
 Originally Posted by -mAx- in Fluent or in Gambit?
Attached Images
 Capture1.jpg (10.3 KB, 110 views) Capture2.jpg (11.6 KB, 77 views) Capture3.jpg (9.0 KB, 79 views)

 January 3, 2011, 02:49 #12 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,031 Rep Power: 31 You cannot mesh directly your geometry with hexa Check Tutorial 7 from Gambit: Modeling Flow in a tank __________________ In memory of my friend Hervé: CFD engineer & freerider

 January 3, 2011, 03:01 'll give it a shot :) #13 New Member   zeeshan Join Date: Dec 2010 Posts: 3 Rep Power: 6 Thnx Max! Regards Zeeshan

 February 3, 2011, 17:58 #14 Member   daalou Join Date: Feb 2011 Posts: 31 Rep Power: 6 THE ONLY SOLUTION WITHOUT TRYING TO redrawing the cylindre is to tick pro intervals, if yu need 10 elements in the axial direction, tick 10 good luck

 September 10, 2011, 11:42 #15 New Member   jbr Join Date: Aug 2011 Posts: 24 Rep Power: 6 hi all i have the following error while trying to open the gambit, can u please tell me hoe do i fix it. gambit XIO: fatal IO error 0 (Winsock Error) on X server JONBONRAKI-PC:0.0 after 0 requests (0 known processed) with 0 events remaining.

 September 26, 2013, 00:16 how about the cylinder imported from Autocad #16 Member   Kai Join Date: Jan 2013 Location: Japan Posts: 90 Rep Power: 4 hi, I'm having a problem with meshing a 3-D cylinder with adaption(like helix) imported from Autocad .sat file. Since the cylinder is imported in gambit as a whole volume, there is no edge on the cylinder in the axial direction.It is difficult to control the mesh quality in the axial direction. any one knows how to solve this problem？

 September 26, 2013, 00:34 #17 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,031 Rep Power: 31 do some splits __________________ In memory of my friend Hervé: CFD engineer & freerider

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post sc298 OpenFOAM Native Meshers: snappyHexMesh and Others 2 March 27, 2011 21:11 Joe CFX 2 March 26, 2007 18:10 Zhengcai Ye FLUENT 5 March 24, 2006 02:04 Kaushik Balakrishnan (Balakrishnan) OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 5 April 21, 2005 13:42 hung FLUENT 7 April 18, 2005 09:38

All times are GMT -4. The time now is 10:23.