CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

timestep study

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 24, 2015, 00:56
Post timestep study
New Member
Join Date: Sep 2014
Posts: 10
Rep Power: 11
wzhang11 is on a distinguished road
Hi all

after conducted several CFD simulations, a question about timestep study has confused me, firstly, the timestep delta t can be estimated through Cr number if we know the flow velocity and minimum cell size, but in some paper i read, timestep study was still studied by half it, so why?

secondary, for the whole domain, we will have refine mesh around the structure and maybe will have prism layers, so how do u guys choose the minimum cell size to calculate delta t?

wzhang11 is offline   Reply With Quote


time step size

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
mesh study with high residuals - redo? SB123 Main CFD Forum 4 December 7, 2014 15:29
Modifying sonicFoam to run with variable timestep - strange results dalaron OpenFOAM Programming & Development 1 September 2, 2013 07:21
grid study, important question hamid1 FLUENT 1 August 4, 2013 00:14
Timestep and Pressure Correction Relationship in SIMPLE rks171 Main CFD Forum 23 May 4, 2012 01:04
Timestep study ijk CFX 6 April 9, 2010 07:38

All times are GMT -4. The time now is 12:28.