CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

deltaT and courant number

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 20, 2021, 08:15
Default deltaT and courant number
  #1
New Member
 
John Kim
Join Date: Jan 2021
Posts: 22
Rep Power: 5
alexio97 is on a distinguished road
Hello openfoamers

I have some questions about deltaT and courant number. If I set adjustTimeStep to no, I thought that maxCo is no use for this case. Am I right?

Also, since time is fixed(i guess...), I thought deltaT doesn't change. Is this right idea?

If I am wrong, please tell me how it is worked!

I just want to make fixed deltaT.

Sincerely, John
alexio97 is offline   Reply With Quote

Old   March 21, 2021, 07:02
Default
  #2
Member
 
Tom
Join Date: Apr 2017
Posts: 50
Rep Power: 9
tom.opt is on a distinguished road
Quote:
Originally Posted by alexio97 View Post
Hello openfoamers

I have some questions about deltaT and courant number. If I set adjustTimeStep to no, I thought that maxCo is no use for this case. Am I right?

Also, since time is fixed(i guess...), I thought deltaT doesn't change. Is this right idea?

If I am wrong, please tell me how it is worked!

I just want to make fixed deltaT.

Sincerely, John



adjustTimeStep will adjust time step such as the maxCo is not exceeded . If you set the parameter to "no" then your time step deltaT shouldn't change. Which solver is this related to? some solvers might not have the functionality enabled
tom.opt is offline   Reply With Quote

Old   March 21, 2021, 23:50
Default
  #3
New Member
 
John Kim
Join Date: Jan 2021
Posts: 22
Rep Power: 5
alexio97 is on a distinguished road
Quote:
Originally Posted by tom.opt View Post
adjustTimeStep will adjust time step such as the maxCo is not exceeded . If you set the parameter to "no" then your time step deltaT shouldn't change. Which solver is this related to? some solvers might not have the functionality enabled
Thanks for your kind reply! I am using interCondesatingEvaporatingFoam. I was curious because if i make this solution to conjugate solver, i wanted to run the solver without changing delta T.
alexio97 is offline   Reply With Quote

Reply


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
Unacceptable deltaT value (like 3e-107) Error saidc. OpenFOAM Bugs 1 March 6, 2020 02:38
Adapt Fluent Mesh to weirOverflow tutorial WaterHammer1985 OpenFOAM Running, Solving & CFD 2 July 5, 2018 03:37
TwoPhaseEulerFoam high courant number mwaqas OpenFOAM Running, Solving & CFD 11 July 11, 2017 15:19
Sudden jump in Courant number NJG OpenFOAM Running, Solving & CFD 7 May 15, 2014 14:52
same geometry,structured and unstructured mesh,different behaviour. sharonyue OpenFOAM Running, Solving & CFD 13 January 2, 2013 23:40


All times are GMT -4. The time now is 01:18.