CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Trouble in Gambit

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 19, 2002, 05:53
Default Trouble in Gambit
  #1
Tom
Guest
 
Posts: n/a
Everyone:

I have a trouble in makeing a mesh of Fluent. My model is a 3d bifurcate pipe which diameter is changed along the pipe. I hope to mesh the model to hexahedron mesh, but all ways I known were invalidated. However I believe the model should be meshed to hexahedron mesh because I had read the same model and its mesh in a paper.

Is someone give me a better and successful way ?

Thanks in advance
  Reply With Quote

Old   July 19, 2002, 09:34
Default Re: Trouble in Gambit
  #2
Christian
Guest
 
Posts: n/a
You don't give many informations about the specific problems, but try dividing the volume into smaller volumes. It might be easier to mesh the total volume. And try to find an appropriate place to start the meshing and the proceed onwards.

Good luck, Christian
  Reply With Quote

Old   July 19, 2002, 09:46
Default Re: Trouble in Gambit
  #3
Puck
Guest
 
Posts: n/a
Regarding meshing in gambit, Is it allrite to ignore warning messages when meshing a volume? And also, Which meshing scheme is the best to use when meshing circular ducts?

  Reply With Quote

Old   July 19, 2002, 10:14
Default Re: Trouble in Gambit
  #4
Laika
Guest
 
Posts: n/a
What kind of warnings.

For a duct: put a boundary-layer-mesh at the walls, mesh an end face with quad pave and mesh the volume with the cooper scheme.

Laika, still orbiting
  Reply With Quote

Old   July 19, 2002, 10:44
Default Re: Trouble in Gambit
  #5
Puck
Guest
 
Posts: n/a
hi, thnx for replying...I have to attach a boundary layer before i can mesh?..havent been doing that all the while. tell you my problem..I ahve to model a hair dryer but doing a schematic version of it.. I have to put an annulus of a small duct inside that of a bigger duct. The bigger duct is a united volume consisting of a frustrum and a cylinder. Untilnow, i hve been meshing using hex/wedge without using boundary layer..somtimes i get the message that copper scheme cant support the meshing etc.. Worried that these mite afftec my iterated results.. Plz help..
  Reply With Quote

Old   July 22, 2002, 03:36
Default Re: Trouble in Gambit
  #6
Laika
Guest
 
Posts: n/a
Of course you can mesh without a boundary layer mesh, but to obtain good results, it's good practice to use a boundary layer-mesh at the walls of ducts.

Try to use the cooper scheme. It's by far the best scheme to mesh ducts. Or try at least to mesh most of your duct with the cooper scheme. Decompose your volume for it!

goodluck,

Laika, still orbiting
  Reply With Quote

Old   July 22, 2002, 17:48
Default Re: Trouble in Gambit
  #7
Soma
Guest
 
Posts: n/a
I think Cooper scheme will not work with such kind of geometry unless one decompose the volume. If your want to mesh as single volume try TGRID scheme
  Reply With Quote

Old   July 23, 2002, 03:26
Default Re: Trouble in Gambit
  #8
Laika
Guest
 
Posts: n/a
If your duct geometry is not extremely complicated, you should decompose and hex-mesh the most of your geometry. Tet-meshing will blow up the simulation-time. If you can hex-mesh, hex-mesh!

greetings, Laika, still orbiting
  Reply With Quote

Old   July 23, 2002, 09:17
Default Re: Trouble in Gambit
  #9
Puck
Guest
 
Posts: n/a
Thnx for all your replies..You people proof to be more helpful than my professors:P anyways, what is the technique to apply boudary layer meshing? Cos when i apply boundary layer, my meshing got error. Whta would be the best way to mesh a duct of radius 4 and length 10cm? Plz reply...

  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
Gambit Startup Window Jay Shim FLUENT 2 February 12, 2015 15:05
Gambit 2.3.16, Xming or Exceed...HELP! bambam3417 FLUENT 10 May 7, 2010 12:39
[GAMBIT] Having trouble getting Gambit to mesh a box! Tickers ANSYS Meshing & Geometry 0 November 7, 2009 07:44
Gambit -dev X11 doesn't work Ervin Amet FLUENT 0 October 28, 2007 09:33
trouble with gambit phani FLUENT 1 December 4, 2004 08:28


All times are GMT -4. The time now is 00:21.