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

transient wind flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 21, 2004, 05:44
Default transient wind flow
  #1
Andrea Vignaroli
Guest
 
Posts: n/a
I have to simulate wind flow over a hill... with steady condions is everything ok! Now i want to try to refine my research simulating the wind with transient conditions ( i try to findout little eddies downstream...). It's a good way? I modified q1 file with

Group 2. Transience STEADY = F GRDPWR(T,10,50.0,2.0)

any better parameters?

Sorry for my english
  Reply With Quote

Old   January 4, 2005, 03:58
Default Re: transient wind flow
  #2
Volker
Guest
 
Posts: n/a
Hi,

basically, if your simulation converges with STEADY=T (i.e. fully implicit), the time-dependent simulation should converge to the same solution after some time, provided that the time step is sufficiently small. Convergence behaviour can however be very different in both cases. For neutral flow over a moderate hill there is not much to expect from a time dependent simulation. In the stable case, one might however capture mountain lee waves. Sometimes it is reported that recirculation zones in the lee of a hill can exhibit time-dependent behaviour but this shows to be highly dependent on the grid and on the order of the convection scheme used.

regards

Volker
  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
Transient Flow, Transient Pressure in Work Bench Erich CFX 1 May 8, 2007 11:55
Modeling of fluctuating wind flow Cuong NK CFX 3 February 22, 2006 07:43
Flow exit out of wind tunnel Peta FLUENT 1 February 3, 2006 10:15
Flow in wind tunnel Peta FLUENT 0 February 2, 2006 10:15
Air Flow within a Wind Tunnel Question Paul Kleinmeulman FLUENT 3 January 12, 2005 20:09


All times are GMT -4. The time now is 07:13.