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

Geometric Modelling problems

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 24, 2001, 07:07
Default Geometric Modelling problems
  #1
V.Kiran
Guest
 
Posts: n/a
Dear sir/Madam, I am working on fluent for the past 10 months.In this period i mainly dealed with 2-d problems.Now i am working on a three dimensional problem.I am founding some difficulties in modelling the problem.So kindly give your suggetions for the problrm which is described in brief here after... My problem is a sparger tube which consists of 1000 holes around its surface. 1)How to create holes on the surface of the cylinder directly.Here i am following some method of splitting and uniting for creating holes on the cylinder surface. i want to know whether any direct method is there in Gambit. 2)Second thing is i had to insert the cylinder with holes into an other cylinder.Here i am finding the mesh problems.So kindly suggest the meshing criteria for the problem. Waiting for your response.... Thanking you, V.Kiran, FCRI,Palakakad.
  Reply With Quote

Old   January 24, 2001, 11:55
Default Re: Geometric Modelling problems
  #2
Sandeep
Guest
 
Posts: n/a
I did it this way (may be there is a better way to do it)

1) Create a vertical cylinder +Y direction (which is basically your sparger tube)

2) Create a horizontal cylinders (Z centered) which has a diameter = hole diameter that you want on the tube and length which is > than the diameter of the cylinder created in step 1. Move this cylinder in + Y direction to whatever location you want your 1st row of holes on the sparger to be.

3) Split 1 with cylinder 2 (Bi-directional split). Unite the middle cylinder that is created a as a result of the split with the cylinder in step 1.

4) Delete the side cylinders (uncheck the lower geometry option so that you keep the face)

5) split volume option: take the cylinder in step 1 and split it with the faces created in step That way u create the sparger holes. Repeat this procedure along the circumference and along the length of the cylinder in step 1.

There might be a better way to do it. Any suggestions ?
  Reply With Quote

Old   January 29, 2001, 00:57
Default Re: Geometric Modelling problems
  #3
V.Kiran
Guest
 
Posts: n/a
Dear Sandeep, Thank you very much.I had also followed the same method to create holes on the cylinder.I also requested you one more question about mesh criteria... Here i am giving the details.... After creating the sparger tube with thousand holes, i should insert that sparger tube in a cylinder which is 4 times the dia of sparger.... My doubt is how i should mesh the above problem, i mean what is the step by step criteria.Here i had been tried with different methods where i couldn't suceed to mesh.As meshing is the important step for all fluid dynamics problem, kindly give your suggestions..... Thank you very much for your previous response... Bye, Kiran
  Reply With Quote

Old   January 29, 2001, 09:16
Default Re: Geometric Modelling problems
  #4
Sandeep
Guest
 
Posts: n/a
I dont think you have a whole lot of options. tet mesh would be best bet considering you have thousands of holes on your sparger tube.
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Needed Benchmark Problems for FSI Mechstud Main CFD Forum 4 July 26, 2011 13:13
Modelling unsteady 2D aerofoil drag xlxc34 Main CFD Forum 0 June 24, 2011 05:42
Summer School on Numerical Modelling and OpenFOAM hjasak OpenFOAM 5 October 12, 2008 14:14
problems with rotatinig incompess. flow modelling vitmalin FLUENT 0 September 26, 2006 01:35
Some problems with Star CD Micha Siemens 0 August 6, 2003 14:55


All times are GMT -4. The time now is 14:48.