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

Difference between bubblefoam and twophaseeulerfoam

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 15, 2008, 15:30
Default Hello, what is the differen
  #1
New Member
 
Enrico Bärow
Join Date: Mar 2009
Location: Germany
Posts: 2
Rep Power: 0
ebaerow is on a distinguished road
Hello,

what is the difference between those two? Both are based on H. Rusche, use Euler-Euler and k-epsilon.
I'm trying to solve a water flow with air being injected.
Although this might be an unsteady process is it possible to solve steady state (with one of these solver)?
Thanks!

Enrico
ebaerow is offline   Reply With Quote

Old   January 29, 2008, 11:51
Default I was told that twoPhaseEulerF
  #2
sek
Member
 
Sung-Eun Kim
Join Date: Mar 2009
Posts: 76
Rep Power: 7
sek is on a distinguished road
I was told that twoPhaseEulerFoam has some additional models that allow granular flows. bubbleFoam came forst, and twoPhaseEulerFoam, an extended version came later.
sek is offline   Reply With Quote

Old   February 3, 2008, 08:12
Default Thanks! So I thing both will
  #3
New Member
 
Enrico Bärow
Join Date: Mar 2009
Location: Germany
Posts: 2
Rep Power: 0
ebaerow is on a distinguished road
Thanks!
So I thing both will be suitable for my problem..
ebaerow is offline   Reply With Quote

Old   March 14, 2009, 07:55
Default Hi..Enrico Barow and others
  #4
Member
 
Raghavendra
Join Date: Mar 2009
Location: Goteborg, Sweden
Posts: 94
Rep Power: 7
raagh77 is on a distinguished road
Send a message via Yahoo to raagh77 Send a message via Skype™ to raagh77
Hi..Enrico Barow and others

my task is to simulate air particle being injected (at the center) to the water as continuous medium. (Becker case)

(Domain being simple 2D rectangular region sides and bottom (except at the center) being walls. Velocity inlet at the center and pressure outlet at the top)


Boundary conditions

1) alpha 0 gradients at the wall
2) inlet uniform 1
3) 3/4 th water (continous phase) filled so alpha being eual to 0 and remaining 1/4 air(discrete phase) and alpha being 1
4) alpha being 1 at the "top" where pressure outlet boundary conditions are set

top
{
type inletOutlet;
inletValue uniform 1;
value uniform 1;
}

5) at the inlet region alpha being 1

velocity-inlet
{
type fixedValue;
value uniform 1;
}

am using twoPhaseEulerFoam solver also I would like to know which could be the best solver when compare with bubbleFoam (turbulence being on)

Simulation errors:
When I try with these boundary conditions for alpha and with 0.9 m/s velocity at the inlet (air velocity) diameter of the particle being 0.00003 m

after few iterations courant number increase (around thousands!!) though the grid is not that fine also very small time step being employed.
Finally simulation crashes :-(


I want to know whether boundary conditions are to be altered or there I have to modify the solver and recompile again!!??

Awaiting for replies!

Regards
Raghavendra
raagh77 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
KEpsilon in bubbleFoam and twoPhaseEulerFoam vkaufmann OpenFOAM Running, Solving & CFD 0 November 5, 2008 08:25
Lift force modeling in bubbleFoam holger_marschall OpenFOAM Running, Solving & CFD 2 December 10, 2007 15:24
CVMcoefficient in bubblefoam stephan OpenFOAM Running, Solving & CFD 4 December 19, 2006 01:48
BubbleFoam alpha equation alberto OpenFOAM Running, Solving & CFD 9 September 21, 2005 01:33
Multiphase flow in bubbleFoam case brahim OpenFOAM Running, Solving & CFD 2 July 25, 2005 14:07


All times are GMT -4. The time now is 06:08.