|
[Sponsors] |
![]() |
![]() |
#1 |
New Member
Sebastian
Join Date: Apr 2018
Posts: 4
Rep Power: 8 ![]() |
Hello,
I´m trying to model a slurry flow (water + solid particles) that goes with free surface. This would be a 3 phase modeling (air, water and solid particles). Is it possible to model the air and water as immiscible fluids and at the same time model the solid particles as a disperse phase contained in the water? What model should I use? Regards. |
|
![]() |
![]() |
![]() |
![]() |
#2 | |
Member
Bhargav Bharathan
Join Date: Jun 2015
Location: Montreal, Canada
Posts: 71
Rep Power: 11 ![]() |
Quote:
Have you tried using the immiscible fluid model in addition to your multiphase model? Read more about it here: http://www.afs.enea.it/project/neptu...th/node333.htm Also, I'm guessing if you have gravity ON and discrete phase interaction with continuous phase ON, your particle must be contained in the water. Make sure that you have assigned the drag models and surface tensions accurately. It sounds like an interesting project, update me if you find a solution. Good luck. -B |
||
![]() |
![]() |
![]() |
![]() |
#3 | |
Member
Join Date: Jul 2012
Location: India
Posts: 32
Rep Power: 14 ![]() |
Quote:
all the best |
||
![]() |
![]() |
![]() |
![]() |
#4 |
New Member
Sebastian
Join Date: Apr 2018
Posts: 4
Rep Power: 8 ![]() |
Blue,
Thanks for your reply, but I can not use VOF+DPM model because of the Volume Fraction of the desperse phase restriction. The slurry I´m trying to model has a volume concentration of over 30%, so the DPM is out of the question. |
|
![]() |
![]() |
![]() |
![]() |
#5 |
New Member
Sebastian
Join Date: Apr 2018
Posts: 4
Rep Power: 8 ![]() |
bhargavbharathan,
Thanks for your reply. By now, I have found that: - The Eulerian immiscible fluid model must be used - Water must be defined as the primary phase in order to be able to carry the descrete granular phase correctly, without further convergence or stability problems. - The symmetry drag model for the water-air interaction and the gidaspow model for the water-particles interaction have good results. (I have used no drag model for the particles-air interaction). So far I have not defined any surface tension parameters. Why do you think it is importante to consider them in my problem? To give you al little bit of context, I´m trying to solve the following: - free surface slurry flow over a rectangular canal (width of 0.56 m and 2% slope). - 0.1 m3/s - Volume concentration of particles in the water: 33.2% - Srocafort |
|
![]() |
![]() |
![]() |
![]() |
#6 |
New Member
Prasanna Welahettige
Join Date: Jan 2016
Location: Norway
Posts: 28
Rep Power: 10 ![]() |
Hi Sebastian,
I am also working with similar kind of project: drilling fluid (Non-Newtonian) and drill cutting (solid) flow in open channel. I have noticed that surface tension parameter between water-air is not significant compared to wall-water friction. Momentum transfer between water-air is negligible however it is important for VOF model. Prasanna. |
|
![]() |
![]() |
![]() |
![]() |
#7 |
New Member
Sebastian
Join Date: Apr 2018
Posts: 4
Rep Power: 8 ![]() |
Thanks for your reply Prasanna.
I will continue to ignore the efect of surface tension between fluid-air. |
|
![]() |
![]() |
![]() |
Tags |
3 phase flow, free surface, slurry |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Thermocapillary free surface flow | zakifoam | OpenFOAM Running, Solving & CFD | 10 | December 12, 2016 11:44 |
Free Surface Flow | anuprdk | FLUENT | 0 | May 5, 2014 20:32 |
CFX gravity driven free surface flow tutorial | mechovator | CFX | 37 | July 27, 2009 10:28 |
free surface flow in non-inertial reference frame | Tiedingg | FLOW-3D | 1 | February 26, 2009 19:51 |
Multiphase flow. Dispersed and free surface model | Luis | CFX | 8 | May 29, 2007 18:13 |