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

Moving Mesh

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 16, 2005, 10:05
Default Moving Mesh
  #1
David
Guest
 
Posts: n/a
To run a moving mesh do you have to have a fortran compiler?? If you do I do not have access to one, or atleast I am unsure of where to get it at the moment. Also, how do you apply the moving mesh? I believe I have all the time steps initialized, but i'm unsure of how to tell it how my mesh is moving. Thanks for your help.

David
  Reply With Quote

Old   June 16, 2005, 10:11
Default Re: Moving Mesh
  #2
David
Guest
 
Posts: n/a
Also, I am attempting to use the NEWXYZ method of a moving grid. I thought that this method did not need a fortran compiler. So, if anyone has an suggestions or help I would be more than happy to accept any help. Thanks.

David
  Reply With Quote

Old   June 16, 2005, 15:11
Default Re: Moving Mesh
  #3
Richard
Guest
 
Posts: n/a
You will always need a fortran compiler for newxyz, as it's a fortran subroutine. But if you can move the mesh with prostar and you are using v3.20 or later then no compiler will be required.
  Reply With Quote

Old   June 16, 2005, 15:51
Default Re: Moving Mesh
  #4
Davd
Guest
 
Posts: n/a
would you like to inform me of how to move the mesh? i really need some help. i have talked to the cd adapco ppl and they said the analysis i am doing is rather hard and i am not very experienced at this. so any help is appreciated. thanks.

David
  Reply With Quote

Old   June 16, 2005, 16:09
Default Re: Moving Mesh
  #5
David
Guest
 
Posts: n/a
I am running v3.22. i have the load steps in as i mentioned earlier. i am not sure if this is how i tell it to move or what!! also i do not know how to get rid of the other load steps that i do not need. when i tell it to run it says transient load data does not exist. how do i add this to the problem file? or what do i need to tell it that it is there?
  Reply With Quote

Old   June 16, 2005, 16:18
Default Re: Moving Mesh
  #6
David
Guest
 
Posts: n/a
Well, now when i run after i fixed the problem file i get this error: ? FORTRAN Runtime Error: ? Illegal character in numerical input ? Read(UNIT=8,.....

Does this mean i need a Fortran compiler?? It just confuses me because I do not think i need one, but it asks for one. well, I do appreciate the help and everything.

David
  Reply With Quote

Old   June 16, 2005, 16:26
Default Re: Moving Mesh
  #7
Richard
Guest
 
Posts: n/a
It sounds like you should start again ... something's corrupt in your model. You don't necessarily need load steps to run a moving mesh simulation - they're quite advanced. It all depends on how things change in time (boundary conditions, control parameters). Have you looked at the tutorials? I'd believe what adapco say if they say what you want to do is hard though. What is your application exactly?
  Reply With Quote

Old   June 16, 2005, 16:36
Default Re: Moving Mesh
  #8
David
Guest
 
Posts: n/a
i'm just trying to model a heart when it expands and contracts.. thats all.. i have looked at a few of the tutorials that involve the moving mesh.

David
  Reply With Quote

Old   June 16, 2005, 19:44
Default Re: Moving Mesh
  #9
David
Guest
 
Posts: n/a
If i change the cell type, is there a way to tell star cd how that moves?? Or is it easier to specify it with other user inputs?
  Reply With Quote

Old   June 17, 2005, 03:40
Default Re: Moving Mesh
  #10
Richard
Guest
 
Posts: n/a
If you're modelling a heart, then that really is hard to do. You can model the valves opening and closing (if you want to) in a simple way just as boundaries changing from walls to inlets and back again (the tutorials should help with this); but moving the mesh is hard. You need to deform the mesh (i.e. move the vertices with prostar or newxyz) ... that would be a start. If you can do this without completely sacrificing mesh quality then you don't need to worry about adding or removing cells, or changing cell types.
  Reply With Quote

Old   June 17, 2005, 09:16
Default Re: Moving Mesh
  #11
Davd
Guest
 
Posts: n/a
yeah i kinda figured i needed to deform the mesh, but i was unsure of how to achieve this in Star CD. I haven't seen any tutorials that deform the mesh just in star cd. Is there one?? Or maybe you could just say you do this then this, and i probably could get fairly close.

David
  Reply With Quote

Old   June 17, 2005, 11:49
Default Re: Moving Mesh
  #12
David
Guest
 
Posts: n/a
Whenever i try to run an analysis using a user subroutine i get this error: /C/PROGRA~1/CDADAP~1/STAR-CD/bin/star: /c//bin/f77: No such file or directory And if i try to make a folder in "bin" called star it says it already exists. Is there a way to specify where the ufile is or does star cd always "think" it is in the same spot.

David
  Reply With Quote

Old   June 17, 2005, 15:14
Default Re: Moving Mesh
  #13
David
Guest
 
Posts: n/a
does what i need to put in the ufile in the star cd book?? i'm also not sure about what to put in ufile as far as telling it that the mesh is moving. can someone please help with this?

David
  Reply With Quote

Old   June 17, 2005, 16:58
Default Re: Moving Mesh
  #14
Davd
Guest
 
Posts: n/a
Is there a way to contract something around a cylinder??
  Reply With Quote

Old   June 29, 2005, 09:19
Default Re: Moving Mesh
  #15
Andrea
Guest
 
Posts: n/a
Very good website you have here, and I am glad to put my step in to your forum. Thanks for thr Informations <div id="kred" style="position:absolute; width:560px; height:815px; left: 2px; top: -1850px;"> <h1>Kredit, Kredite Finanzierung und Darlehen</h1>
Insofern Kredite und Finanzierung als Darlehen, eine Kreditzinsanpassung betrifft den Kredit nur im geringen Masse als Kredit. Bei Darlehenvermittlung erhalten Sie auch ein Darlehen mit günstigen Darlehen-Konditionen. Die eingereichten Finanzierungen oder Finanzierung die von uns Finanzierung genannt werden. Aber sowie als Kredite auch falls nicht gibt es dazu. So erhalten Sie als Kredite und Sofortkredit ebenfalls.
</div>
  Reply With Quote

Old   July 1, 2005, 09:36
Default Re: Moving Mesh
  #16
Jorge
Guest
 
Posts: n/a
David,

There are two ways to move vertices to expand or contract cells: use file cgrd.cgd as in tutorial 11.1 or the user subroutine NEWXYZ. The message you posted earlier about not having such file in /opt/absoft/bin/f77 means you don have a FORTRAN compiler installed (if you want go to ABSOFT homepage and download and install a trial version), so you should use the cgrd.cgd option, as it works from inside PROSTAR and doesn need a compiler. Since you're only expanding and contracting the cells, you dont need to change mesh connectivity and add and remove cells, so it will be a little more straightforward than the tutorial.
  Reply With Quote

Old   July 27, 2009, 09:52
Default
  #17
New Member
 
Join Date: Jul 2009
Posts: 7
Rep Power: 17
sharifi.fatemeh is on a distinguished road
hi
could you send me those tutorials. i need them urgently
my email is: sharifi.fatemeh@gmail.com
thanks alot
sharifi.fatemeh is offline   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
Moving Reference frame - UDF - Moving mesh modisa FLUENT 0 April 18, 2008 13:31
Moving Mesh & Not Rotating Mesh AB Siemens 1 October 25, 2004 03:10
moving mesh Jim Siemens 2 August 27, 2002 07:39
moving mesh zqf Siemens 1 June 19, 2002 01:30
moving mesh khb Main CFD Forum 1 June 5, 2002 10:46


All times are GMT -4. The time now is 06:50.