CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

Variable distinction in settlingFoam Solver

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 12, 2007, 14:12
Default What is the alpha variable in
  #1
New Member
 
Paul Mathis
Join Date: Mar 2009
Posts: 8
Rep Power: 8
paul is on a distinguished road
What is the alpha variable in the settlingFoam solver. I thought alpha was the solids fraction, but the settling tutorial uses a value of 0.001. This seems to be a very low number for the solids fraction.
paul is offline   Reply With Quote

Old   September 16, 2007, 11:47
Default Hi Paul, You are right - 'a
  #2
Member
 
Patricio Bohorquez
Join Date: Mar 2009
Location: Jaén, Spain
Posts: 94
Rep Power: 8
pbohorquez is on a distinguished road
Hi Paul,

You are right - 'alpha' is the volumetric fraction of particle in the particle-fluid mixture. You can read the thesis by Daniel Brennan (2001) for further details: Section 6.4-6.6 corresponds with the Dahl tutorial, while Chapter 7 deals with the tank3D case.

Please, take into account that although the initial suspended load is really low, as time goes by the settled sludge layer raises (where the volumetric fraction reaches the maximum packing factor).

Patricio.
pbohorquez 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
MRF and settlingFoam erik023 OpenFOAM Running, Solving & CFD 0 November 11, 2008 12:29
fluent solver variable Peter FLUENT 0 October 8, 2006 11:59
Accessing Solver Variable for UDF CFDtoy FLUENT 0 May 9, 2006 19:29
Variable value with time - from SOLVER FILE Tuks CFX 4 July 11, 2005 05:49
Flame distinction Mark FLUENT 1 February 18, 2003 15:28


All times are GMT -4. The time now is 21:53.