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

Using simulation results as time-resolved boundary condition

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 15, 2012, 05:52
Default Using simulation results as time-resolved boundary condition
  #1
Member
 
Robert
Join Date: Aug 2012
Location: Berlin
Posts: 74
Rep Power: 3
vainilreb is on a distinguished road
Hi,

I've had the idea of simulating a very small area with a really fine mesh and then take the results as input for a more coarse simulation in a larger area. But I don't simply want to define a start condition at the junction but to let them vary by time, just as calculated in the fine simulation before. I hope you get what I mean, I don't really know how to explain it in English. Is this possible and if so, how?

I really hope anyone can help me.

Robert
vainilreb is offline   Reply With Quote

Old   November 19, 2012, 01:55
Default
  #2
Member
 
Robert
Join Date: Aug 2012
Location: Berlin
Posts: 74
Rep Power: 3
vainilreb is on a distinguished road
Isn't there any possibility to do this?

In my case there is ammonia flowing into a room filled with air at high inlet velocities. Due to the high gradient in the gas concentrations at the inlet I have to keep the cell size extremely tiny. This makes the time step become extremely tiny. So I thought about calculating the process of gas inflow in a smaller control volume with very fine cells around the outlet and then use this control volume as inlet for a more coarse and faster calculation of the environmental setup.

Isn't this possible?
vainilreb is offline   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
Difficulty in calculating angular velocity of Savonius turbine simulation alfaruk CFX 8 December 3, 2013 16:51
the problem of my transient simulation "Floating point exception: Overflow " alloveyou CFX 15 November 22, 2012 11:14
Extrusion with OpenFoam problem No. Iterations 0 Lord Kelvin OpenFOAM 6 April 12, 2011 11:24
External Radiation Boundary Condition (Two sided wall), Grid Interface CFD XUE FLUENT 0 July 8, 2010 06:49
New topic on same subject - Flow around race car Tudor Miron CFX 15 April 2, 2004 05:18


All times are GMT -4. The time now is 05:17.