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

Can parrallel model be run in sequential mode?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 3, 2008, 11:29
Default Can parrallel model be run in sequential mode?
  #1
mepgzzi
Guest
 
Posts: n/a
Hi all,

I have the task to re-run a parallel model (with usr subroutines), but I dont have parallel licences.

Is it possible to run a parallel model directly in sequential mode without changing anything?

I found during the trial calculation that there are warnings about the boundaries and the injection model is not evoked at all(no fuel injected), different from previous results.

Where shall I make the modification?

Thanks in advance.

Mepgzzi
  Reply With Quote

Old   April 3, 2008, 14:21
Default Re: Can parrallel model be run in sequential mode?
  #2
James
Guest
 
Posts: n/a
It should, all other things being equal, work.

Did you rewrite all the files from Prostar ?

Did you check the setup in Prostar ?

Were the versions identical ?

  Reply With Quote

Old   April 4, 2008, 04:13
Default Re: Can parrallel model be run in sequential mode?
  #3
mepgzzi
Guest
 
Posts: n/a
Hi James,

The original model was a 2 stroke engine built up with es-ice and starcd 3.26.(I only have 3.24)

There is no valve movement, Intake and exhaust controlled by piston position. Attach boundaries are applied to both the cylinder wall and the port surfaces that will overlap with the cylinder.

I have error resuming the model because of the my starcd version 3.24. The Time relationship is in seconds instead of in angle(the latter should be a default setup with es-ice). Piston position and velocity are set through a user subroutine. Run time control is not set, and DTSTEP is used for time step control.

As I couldnt write a proper problem file, I didnt change anything and left it as it was and I run star -dp. The calculation could go on!

Then during the simulation, there are following warnings

1. At the beginning: POSTAT is activated but not used

2.when the cylinder and ports are connected:

Cell**** has master asi face wihich remains unmatched for 100% of its area.

You should either revise grid chage comands, ajust tolerance or turn partial boundaries on.

3.No injection is observed. There is no fuel concentration.

What caused these problems? What kind of modifications can I make? Is it necessary that I use 3.26?

Thanks!

Mepgzzi

  Reply With Quote

Old   April 4, 2008, 04:28
Default Re: Can parrallel model be run in sequential mode?
  #4
Jim
Guest
 
Posts: n/a
You should get 3.26, if you speak to your local agent they should be able to get you it.
  Reply With Quote

Old   April 6, 2008, 11:02
Default Re: Can parrallel model be run in sequential mode?
  #5
Donald
Guest
 
Posts: n/a
Can the guy who gave you the model explains a bit what he did and how to run it?

How can people come into a situation where they receive a model they have no clue about, has some specific subroutine with it and then need to ask a forum how to run it...This is unbelievable.

  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
Icem tetra - Running in parrallel? Joe CFX 5 September 9, 2006 12:37
Parrallel solver Andrea CFX 2 May 23, 2004 00:49
sequential execution of fluent giorgia FLUENT 0 April 12, 2003 04:45
Sequential calculation of Temperature and mass tra J.W.Ryu FLUENT 7 June 18, 2002 07:12
sequential batch run jy FLUENT 2 August 2, 2000 11:41


All times are GMT -4. The time now is 23:46.