CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Time step size

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

LinkBack Thread Tools Search this Thread Display Modes
Old   March 20, 2014, 03:44
Default Time step size
New Member
Join Date: Feb 2014
Posts: 4
Rep Power: 12
Tarin is on a distinguished road
Dear friends,

I'm doing a transient simulation of the cooling in a clutch. I chose a time step of 0,001s and stablished the max Iterations/time step = 30

Residuals decreased in each time steps iterations to 1e-4 so I considered it was working OK. The problem is that the time step is very small so I need a lot of time to carry out the complete simulation.

I have tried increasing the time step to 0.01s and max Iterations/time step=70. Even if each time steps takes longer 10 times less time steps are needed so it will finish quicker.

I wanted to ask if it is correct to do this as long as the residuals in each time step decrease to the same point (1e-4)

Thanks in advance
Tarin is offline   Reply With Quote


iterations, residuals, time step size, transient simulations

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
Transient simulation not converging skabilan OpenFOAM Running, Solving & CFD 14 December 16, 2019 23:12
simpleFoam error - "Floating point exception" mbcx4jc2 OpenFOAM Running, Solving & CFD 12 August 4, 2015 02:20
Sudden jump in Courant number NJG OpenFOAM Running, Solving & CFD 7 May 15, 2014 13:52
Micro Scale Pore, icoFoam gooya_kabir OpenFOAM Running, Solving & CFD 2 November 2, 2013 13:58
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 13:43

All times are GMT -4. The time now is 23:38.