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

-continue-from-file

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

Like Tree1Likes
  • 1 Post By Gert-Jan

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 6, 2022, 06:59
Default -continue-from-file
  #1
New Member
 
hang yang
Join Date: Apr 2022
Posts: 17
Rep Power: 2
yhddd is on a distinguished road
I did a transient simulation, and I got a .trn file, and I want to use that .trn file as an initial condition for the next calculation, and I'm using -continue-from-file, and I tried -continue-from-file chushi.trn, But the system says trn file is invalid, I wonder if this command can't use trn file as initial condition, if not, what can i do, I can't use visual interface, must use command line.
yhddd is offline   Reply With Quote

Old   April 6, 2022, 07:40
Default
  #2
Senior Member
 
Join Date: Jun 2009
Posts: 1,575
Rep Power: 28
Opaque will become famous soon enough
You can definitely use a <number>_full.trn file.

I do not recall ever using a <number>.trn file before. They are different since the latter is missing a ton of information likely required to be used as an initial condition.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.
Opaque is offline   Reply With Quote

Old   April 6, 2022, 08:08
Default
  #3
New Member
 
hang yang
Join Date: Apr 2022
Posts: 17
Rep Power: 2
yhddd is on a distinguished road
Quote:
Originally Posted by Opaque View Post
You can definitely use a <number>_full.trn file.

I do not recall ever using a <number>.trn file before. They are different since the latter is missing a ton of information likely required to be used as an initial condition.
I tried using the _full.trn file, but he still told me:
A valid initial values file is required for the run. ansys cfx initial values file 5100_full.trn does not exist
yhddd is offline   Reply With Quote

Old   April 6, 2022, 08:28
Default
  #4
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,579
Rep Power: 24
Gert-Jan will become famous soon enough
you can use .res and .bak filles since they contain a mesh. .trn-files not.
Gert-Jan is offline   Reply With Quote

Old   April 6, 2022, 08:30
Default
  #5
New Member
 
hang yang
Join Date: Apr 2022
Posts: 17
Rep Power: 2
yhddd is on a distinguished road
Quote:
Originally Posted by Gert-Jan View Post
you can use .res and .bak filles since they contain a mesh. .trn-files not.
When I set save trn file, I checked save grid
yhddd is offline   Reply With Quote

Old   April 6, 2022, 08:32
Default
  #6
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,579
Rep Power: 24
Gert-Jan will become famous soon enough
Why not use a back-up file?
Gert-Jan is offline   Reply With Quote

Old   April 6, 2022, 15:53
Default
  #7
Senior Member
 
Kira
Join Date: Nov 2020
Location: Canada
Posts: 436
Rep Power: 6
aero_head is on a distinguished road
Quote:
Originally Posted by yhddd View Post
I did a transient simulation, and I got a .trn file, and I want to use that .trn file as an initial condition for the next calculation, and I'm using -continue-from-file, and I tried -continue-from-file chushi.trn, But the system says trn file is invalid, I wonder if this command can't use trn file as initial condition, if not, what can i do, I can't use visual interface, must use command line.
Just use the .res file set as the initial conditions
aero_head is offline   Reply With Quote

Old   April 6, 2022, 21:00
Default
  #8
New Member
 
hang yang
Join Date: Apr 2022
Posts: 17
Rep Power: 2
yhddd is on a distinguished road
Quote:
Originally Posted by aero_head View Post
Just use the .res file set as the initial conditions
That means, if I'm starting the simulation from the command line, do I have to use the .res format? I can use the .trn or .bak format as an initial condition when I'm using a visual interface
yhddd is offline   Reply With Quote

Old   April 7, 2022, 02:58
Default
  #9
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,579
Rep Power: 24
Gert-Jan will become famous soon enough
You cannot use a .trn-file as initial conditions. Wasn't it clear? How often do we need to repeat?

You seem to be lost somewhere. Can you explain what you are doing and what your real problem is? Now we need to read between the lines, which is difficult.

Nevertheless, if I'm correct, it looks like you have a transient run, that crashes, and that you have only .trn-files from which you want to continue with different settings. You cannot do that. Trn-files are only for Postprocessing, e.g. for making a nice animation. You should create .bak-files. In CFX-Pre, in the same tab as where you define the .trn-file, you can set how often the solver should write Backup files. You can do it every timestep. And if you are not sure which timestep is safe to continue with, you should keep every .bak-file. But potentially, this will eat a lot of diskspace.

Then, if you run from command line, it is:

cfx5solve -def <file.def> -ini <file.bak>

or, if you have a good .res-file:

cfx5solve -def <file.def> -ini <file.res>
aero_head likes this.
Gert-Jan 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
Using PengRobinsonGas EoS with sprayFoam Jabo OpenFOAM Running, Solving & CFD 35 April 29, 2022 15:35
OpenFoam "Permission denied" and "command not found" problems. iyidaniel@yahoo.co.uk OpenFOAM Running, Solving & CFD 11 January 2, 2018 06:47
polynomial BC srv537 OpenFOAM Pre-Processing 4 December 3, 2016 09:07
[foam-extend.org] problem when installing foam-extend-1.6 Thomas pan OpenFOAM Installation 7 September 9, 2015 21:53
"parabolicVelocity" in OpenFoam 2.1.0 ? sawyer86 OpenFOAM Running, Solving & CFD 21 February 7, 2012 11:44


All times are GMT -4. The time now is 05:01.