CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

High pressure concentration results @ the inlet

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 25, 2007, 00:42
Default High pressure concentration results @ the inlet
  #1
Kuh
Guest
 
Posts: n/a
Hi everyone!

I'm simulating a mixing device using multiphase flow with dispersed liquid droplets(const diamater) in vapor. The inlet velocity of vapor is twice to that of droplets. The results show that there is an abrupt change of static pressure at the inlet side along the center line. It changes from highest to lowest value of the results in a span of 1mm (total length of mixing section is 260mm) though the values in other parts agree well with experimental data.I have tried using equal inlet velocities for both fluids which is computed using the Energy and Momentum of the previous setup's inlet condition, the high pressure concentration were eliminated but the results are significantly higher than the experimental.

The unequal inlet velocities setup represents the mist flow of fluids supplied to the mixing section where the vapor phase is faster than liquid droplets. Do you have any other idea on how to eliminate the high pressure concentrations? Is it significant enough to affect the general results?

Thank you so much for your response!

Much appreciated, Kuh
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pressure Inlet Boundary Condition Prasad FLUENT 6 April 9, 2013 22:32
Help ASAP! pressure inlet & outlet engahmed FLUENT 0 June 13, 2010 16:33
High pressure in rhopSonicFoam results in negative pressure shangzung OpenFOAM 0 November 5, 2009 04:24
Pressure Rise Error emueller CFX 0 May 5, 2009 12:08
Reversed flow in pressure inlet eric FLUENT 3 January 26, 2004 21:04


All times are GMT -4. The time now is 07:31.