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

Time step size in VOF implicit

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

LinkBack Thread Tools Display Modes
Old   July 28, 2013, 01:50
Default Time step size in VOF implicit
Senior Member
Join Date: Jan 2013
Posts: 177
Rep Power: 7
flow_CH is on a distinguished road
I am new user in CFD.
I am modeling in VOF multiphase. In vof panel with activating the implicit, the courant number is deactive.
In this case, how can i define Time step size?
flow_CH is offline   Reply With Quote

Old   July 28, 2013, 16:00
Stephan Langenberg
Join Date: Sep 2011
Location: Germany
Posts: 73
Rep Power: 8
Jim87 is on a distinguished road
There is an universal equation in the users guide. In order to calculate your iteration to the timestep.

In my eyes you could test 3 cases (like 0,1 sec; 0,01 and 0,001). The residuals should give a first hint, if a time step size fits or not.

A general answer for your case isn't that easy. Maybe test 3 step sizes?

Here a discussion (maybe helpfull):
Jim87 is offline   Reply With Quote


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
Multiple floating objects CKH OpenFOAM Running, Solving & CFD 12 March 21, 2016 14:05
mixerVesselAMI2D's mass is not balancing sharonyue OpenFOAM Running, Solving & CFD 6 June 10, 2013 09:34
calculation diverge after continue to run zhajingjing OpenFOAM 0 April 28, 2010 04:35
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Transient simulation not converging skabilan OpenFOAM Running, Solving & CFD 12 September 17, 2007 17:48

All times are GMT -4. The time now is 00:30.