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

Reversed flow at inlet condition

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 17, 2010, 12:50
Default Reversed flow at inlet condition
  #1
New Member
 
saravanakumar
Join Date: Mar 2009
Location: United Kingdom
Posts: 17
Rep Power: 17
sar_mech is on a distinguished road
Hi all,
I am trying to simulate a trainsient state problem, i am getting the following error
" reversed flow in 76 faces on pressure-inlet"

could anyone please help me on how to tackle this problem.

thank you in advance.....
sar_mech is offline   Reply With Quote

Old   November 18, 2010, 07:06
Question check boundary conditions
  #2
Member
 
Join Date: Oct 2010
Posts: 45
Rep Power: 16
siri is on a distinguished road
hi,

there might be variety of reasons for it happening. its difficult to decode this type of error unless the context is clear.

if you are solving for a incompressible turbulent flow, it might have to do something with the boundary condition setting such as

i) use of a turbulence specification method at inlet;
ii) maybe you could use a velocity inlet instead of pressure inlet
iii) if u have/haven't set a reference pressure and temperature point

check ur problem physics as well, if it justifies a reverse flow as in due to negative velocity (suction) at inlet
siri is offline   Reply With Quote

Old   November 18, 2010, 07:17
Default
  #3
New Member
 
saravanakumar
Join Date: Mar 2009
Location: United Kingdom
Posts: 17
Rep Power: 17
sar_mech is on a distinguished road
Thanks siri,

I will try with vel. inlet.




Quote:
Originally Posted by siri View Post
hi,

there might be variety of reasons for it happening. its difficult to decode this type of error unless the context is clear.

if you are solving for a incompressible turbulent flow, it might have to do something with the boundary condition setting such as

i) use of a turbulence specification method at inlet;
ii) maybe you could use a velocity inlet instead of pressure inlet
iii) if u have/haven't set a reference pressure and temperature point

check ur problem physics as well, if it justifies a reverse flow as in due to negative velocity (suction) at inlet
sar_mech is offline   Reply With Quote

Old   November 23, 2010, 05:50
Smile
  #4
Member
 
Join Date: Oct 2010
Posts: 45
Rep Power: 16
siri is on a distinguished road
Quote:
Originally Posted by kellyj994 View Post
Great post! It's very nice. Thank you so much for your post.
Kelly you are welcome and thanks for sharing your opinion here. best wishes

S
siri is offline   Reply With Quote

Reply


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
unbounded reversed flow on outlets kwardle OpenFOAM 8 March 7, 2018 11:34
Problem with assigned inlet velocity profile as a boundary condition Ozgur_ FLUENT 5 August 25, 2015 05:58
Reversed Flow in Outlet Steve FLUENT 18 March 30, 2013 08:50
in CFX, how to define a inlet condition of feedback control flow rate ? suihenry CFX 12 May 14, 2009 18:59
outlet boudary condition for a flow in the pipe Atit CFX 2 November 9, 2004 18:43


All times are GMT -4. The time now is 02:40.