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

Liquid film

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 21, 2005, 02:40
Default Liquid film
  #1
Trond G. Grüner
Guest
 
Posts: n/a
I am modeling a 2D two-phase diffuser. Before injecting droplets I want to have a solution for gas-liquid film flow. The model will be compared to real experiments. The diffuser is 31.7 cm, and the inlet and outlet section are respectively 75 cm and 49 cm. The height of the diffuser is 2 cm (symmetry 1 cm) and the liquid film thickness is 0.025 cm. The gas mass flow is 2.8 kg/s and the liquid film mass flow is 0.8 kg/s, which results in a high velocity difference.

Information: k-e model, about 300*40 cells in every section, VOF

I do not get a solution to my problem. Does anyone have experience with analogous or relevant modeling?

I have tried to change the under-relaxation factors without success.
  Reply With Quote

Old   April 26, 2005, 15:34
Default Re: Liquid film
  #2
CFDtoy
Guest
 
Posts: n/a
Make sure the number of cells capturing the liquid film thickness is relevant. If you dont have many cells in the liquid region, what would you be trying to resolve ? the interface capturig scheme wud do no good.

CFDtoy
  Reply With Quote

Old   April 26, 2005, 16:03
Default Re: Liquid film
  #3
tgg
Guest
 
Posts: n/a
Do you have any suggestion for number of cells in the liquid region or/and the inlet section? Consider only the diffuser inlet section (length - 0.75 m, height included the liquid film thickness - 0.02 m). This problem is related to premature boundary layer separation due to presence of liquid and droplet flow. I also want to see the change in pressure recovery.

Trond
  Reply With Quote

Old   April 27, 2005, 18:37
Default Re: Liquid film
  #4
CFDtoy
Guest
 
Posts: n/a
I would say 7-10 cells would be good enuf. But again, based on your numerical schemes, the convergence would appropriately vary.

CFDtoy
  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
simulation of liquid thin film Saman Main CFD Forum 4 March 11, 2018 00:55
Thin liquid FILM breaks with InterFOAM ovie OpenFOAM 5 June 25, 2010 13:18
VOF problem, liquid film thickness Pedro24 FLUENT 0 May 13, 2009 05:57
Liquid film trond FLUENT 0 April 22, 2005 04:24
liquid film modeling David Carnaga Main CFD Forum 2 July 18, 2002 21:07


All times are GMT -4. The time now is 00:06.