CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Local time Stepping

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 19, 2008, 08:38
Default Local time Stepping
  #1
phi
Guest
 
Posts: n/a
Hi,

I have question concerning local time stepping. First of all, I will write a small introduction so everyone can understand what I am talking about.

For local time stepping, the time-step Dt depends on the current grid-cell:

dt=C*dx_(i,j,k)/(|c| + a)

dx = grid spacing c = velocity a = velocity of sound

I know that dt is not constant. But I have problems to understand how the local time step influences the differential equation system in a steady simulation - since Q^(n+1) = Q^(n).

J*dQ/dt + dE/dx_1 + dF/dx_2 + dG/dx_3 = 0

  Reply With Quote

Reply

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
Dynamic moving mesh Pei-Ying Hsieh (Hsieh) OpenFOAM Running, Solving & CFD 64 June 7, 2012 10:04
alphaEqn.H in twoPhaseEulerFoam cheng1988sjtu OpenFOAM Bugs 14 September 18, 2011 13:46
Error while running rhoPisoFoam.. nileshjrane OpenFOAM Running, Solving & CFD 8 August 26, 2010 12:50
BlockMeshmergePatchPairs hjasak OpenFOAM Native Meshers: blockMesh 11 August 15, 2008 07:36
Info on local time stepping Frank Muldoon Main CFD Forum 1 October 9, 1998 07:44


All times are GMT -4. The time now is 07:30.