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

problem with multiphase project

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 1, 2015, 04:41
Default problem with multiphase project
  #1
Senior Member
 
amin.z's Avatar
 
Amin
Join Date: Oct 2013
Location: Somewhere on Earth
Posts: 297
Rep Power: 5
amin.z is on a distinguished road
hey friends!

I have an unusual problem with my multiphase project!
as you see in attached photo, the problem is a bubble column! the air and water enter form top separately ( in the pic, right! ) After air and water were mixed together, based on buoyancy force, water exits from outlet at the bottom (in the pic, left! ) and air exits form side outlets!
I'm using eulerian model for multiphase, and neglected heat transfer (energy equation is off!)
the gravity direction is to bottom side ( in the pic, left side!)
the solution works good at the beginning, but after a while, a large and unreasonable back flow occurs! Almost 3 times the amount of inlet water!

In your opinion, what is wrong?
thanx in advance!
Attached Images
File Type: jpg ax.jpg (18.8 KB, 6 views)
__________________
Best regards,
Amin

Last edited by amin.z; January 1, 2015 at 08:01.
amin.z is offline   Reply With Quote

Old   January 1, 2015, 11:10
Default
  #2
Member
 
BijanKianoush
Join Date: May 2014
Location: Iran Tehran
Posts: 85
Rep Power: 3
HyperNova is on a distinguished road
hi, i dont understand how do they mixed ? from where mixing process starts ?!
HyperNova is offline   Reply With Quote

Old   January 1, 2015, 15:39
Default
  #3
Senior Member
 
amin.z's Avatar
 
Amin
Join Date: Oct 2013
Location: Somewhere on Earth
Posts: 297
Rep Power: 5
amin.z is on a distinguished road
Quote:
Originally Posted by HyperNova View Post
hi, i dont understand how do they mixed ? from where mixing process starts ?!
Slm!
Water and air injected from right and afterward about 5 centimeters were mixed together! Because water enters with high speed the air mixes with the water!
__________________
Best regards,
Amin
amin.z is offline   Reply With Quote

Old   January 2, 2015, 04:43
Default
  #4
Member
 
BijanKianoush
Join Date: May 2014
Location: Iran Tehran
Posts: 85
Rep Power: 3
HyperNova is on a distinguished road
can you send a photo of the real object or subject you are modelling ? i dont really understand anything of this picture and you know here speaking farsi is prohibited
HyperNova 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
Multiphase phase (gas-solid) flow using Eulerian-Granular medel ( divergence problem) jessie FLUENT 3 May 29, 2014 11:05
Mass imbalance problem in multiphase water and steam CFX case Antech CFX 0 February 19, 2014 06:46
[ICEM] Problem while reopening a project Daniel_Khazaei ANSYS Meshing & Geometry 3 January 23, 2014 08:11
Coupled VOF and Multiphase Segregated Flow for a gas bubble problem?? EnronZhang STAR-CCM+ 1 December 19, 2013 09:41
Multiphase Problem Kelsuis FLUENT 3 January 28, 2010 03:43


All times are GMT -4. The time now is 07:41.