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

reverse flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 13, 2005, 05:25
Default reverse flow
  #1
P.R.Naren
Guest
 
Posts: n/a
How to tackle reverse flow. what is the reason for reverse flow. my outlet boundart condition is already set to pressure out (1 atm) this is concerned with gas solid two phase flow simulation
  Reply With Quote

Old   May 13, 2005, 07:10
Default Re: reverse flow
  #2
Sham
Guest
 
Posts: n/a
change your geometry or may be consider another boundary condition.

Sham.
  Reply With Quote

Old   May 13, 2005, 08:24
Default Re: reverse flow
  #3
P.R.Naren
Guest
 
Posts: n/a
Sham

thanks for ur interest . But unfortunately i cant cahnge the geometry or the boundary condition. i want to simualate teh flow behavior that specified condition so what else can i do with
  Reply With Quote

Old   May 13, 2005, 15:14
Default Re: reverse flow
  #4
Sham
Guest
 
Posts: n/a
Having reverse flow at a pressure outlet is not necessarily bad. All that happens is that a pressure outlet becomes a pressure inlet, by using the 'reverse' quantities that you specified. Vice versa if reverse flow is recorded at a pressure inlet. So it is important to set sensible numbers for the reverse quantities (eg for the turbulence quantities, chose intensity and length scale)

Sham.
  Reply With Quote

Old   May 13, 2005, 16:20
Default Re: reverse flow
  #5
tucker
Guest
 
Posts: n/a
From what I've read, this is the benefit of the pressure-outlet BC. If you used outflow for example, you would not pick up reverse flow and your accuracy would suffer as a result. I agree with Sham.
  Reply With Quote

Old   May 19, 2005, 01:15
Default Re: reverse flow
  #6
shyam
Guest
 
Posts: n/a
Your domain size may not sufficient.Extend you domain at outlet and apply Wall-Slip-boundary condition on extended portion.
  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
Reverse Flow Bharati FLUENT 0 September 14, 2010 01:09
Flow simulation in reverse drum mixer Patel Chirag CFX 0 July 19, 2010 15:05
reverse flow alikami FLUENT 1 June 2, 2010 04:19
Reverse flow in the VOF model yan FLUENT 1 May 26, 2005 09:14
reverse flow Giovanni FLUENT 11 October 15, 2001 03:01


All times are GMT -4. The time now is 05:25.