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

ALE, rezoning, remapping procedure

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 18, 2006, 03:28
Default ALE, rezoning, remapping procedure
  #1
ALE newbie
Guest
 
Posts: n/a
I've read quite a few papers on ALE "arbitrary Lagrangian Eulerian" formulation and I'm trying to modify my FVM solver to work in a moving object.

I have an idea but I'm not sure if it is correct. These are the steps:

1. use the momentum eqn in ALE form, which involves using the relative convective velocity. no change to the poisson eqn

2. calculate the grid velocity following GCL

3. solve the NS eqns

4. deform the mesh to new time step

5. rezoning ie do a remeshing if mesh quality is poor

6. remapping ie transfer old mesh cell center values to new mesh thru interpolation.

7. repeat from step 2

Are these the general steps? I hoped I have not missed out anything. Tks!
  Reply With Quote

Old   August 18, 2006, 06:45
Default Re: ALE, rezoning, remapping procedure
  #2
ganesh
Guest
 
Posts: n/a
Dear ALE Newbie,

Your idea is right and you do not seem to have missed out the steps. But in each step you must be quite careful while implementing the ALE form, specifically while replacing the fluid velocity with the relative velocity. Also, note that the BCs (esp. on the wall) should be treated properly.

Regards,

Ganesh
  Reply With Quote

Old   August 18, 2006, 08:56
Default Re: ALE, rezoning, remapping procedure
  #3
ptaotao
Guest
 
Posts: n/a
Hello. I'm also trying to modify my FVM solver to work in a moving object, now i'm thinking about the method ,can you give me some advices? or we can change ideal with each other!
  Reply With Quote

Old   August 18, 2006, 13:30
Default Re: ALE, rezoning, remapping procedure
  #4
ganesh
Guest
 
Posts: n/a
Dear ptaotao,

I could send some papers, a good concise paper would be of Venkatakrishnan and Mavriplis. The broad steps are same as Newbie has pointed out. I could send some useful papers if you could send me your mail id.

Regards,

Ganesh
  Reply With Quote

Old   August 19, 2006, 04:46
Default Re: ALE, rezoning, remapping procedure
  #5
zonexo
Guest
 
Posts: n/a
Hi Ganesh,

i'm interested in the papers. Can you please send me too? my email is zonexo@gmail.com.

Thanks alot!
  Reply With Quote

Old   August 19, 2006, 06:30
Default Re: ALE, rezoning, remapping procedure
  #6
ptaotao
Guest
 
Posts: n/a
Dear Ganesh,

That's exactly what I am looking for. it is very much appreciated.I think those papers will help me a lot,My mail is kkndttt@sina.com .

Thanks very much

Sincerely, Ptaotao
  Reply With Quote

Old   August 19, 2006, 07:45
Default Re: ALE, rezoning, remapping procedure
  #7
Jonas Holdeman
Guest
 
Posts: n/a
It seems several people are interested in this, including myself.

Last Spring I was looking at time advancement using a twist on finite elements in time, and in time and space, using Hermite elements. I know that finite difference in time is the standard approach, but this F.E. approach, going one time step at a time, can generate a number of standard integration methods/formulae, as well as some novel methods. The obvious extension was to problems with moving boundaries. The obvious problem is incompressible fluid flow in an elastic duct/hose/... . The application is to blood flow.

I am not familiar with ALE beyond the name, so that has been on my "to do" list to learn. I don't know where to get started in researching the literature. References would be helpful to me too.
  Reply With Quote

Old   August 22, 2006, 02:45
Default Re: ALE, rezoning, remapping procedure
  #8
ALE newbie
Guest
 
Posts: n/a
Pls send it to me as well at quarkz@126.com.

Thank you very much. Regards
  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
OpenFOAM-1.6 install cookbook MadsR OpenFOAM Installation 372 November 20, 2010 12:57
Calculation of Averages in lesInterFoam Erroneous Procedure ngj OpenFOAM Bugs 6 April 15, 2008 13:21
Question abt Overset & ALE Ben Main CFD Forum 0 June 18, 2007 12:06
Fractional step in ALE form - possible? Wee Main CFD Forum 2 October 3, 2006 10:20
ALE help Quarkz Main CFD Forum 0 January 13, 2006 07:02


All times are GMT -4. The time now is 23:24.