|July 5, 2013, 19:08||
Slug flow simulation with VOF
Join Date: Oct 2009
Posts: 100Rep Power: 8
I'm simulating 2-D axi-symmetric slug flow (air-water) in a vertical pipe using VOF model of ANSYS FLUENT using following boundary conditions and models:
Inlet: mixture vel: 1.375 m/s, liquid hold up: 0.85
Outlet: pressure outlet with 0 back flow liquid hold up
primary phase: air
RNG KE model
Geo-Reconstruction discretization for VOF
2nd order discretization for other parameter (velocity, k, e)
time step: 0.00005
length of pipe: 3.4 m
the simulation was ran just for 1.8 sec.
i got this result for contour of air void fraction. (see the attached)
My question is: slug flow is necessary periodic? it is obvious that there are slugs in the picture and the simulation could capture the slug shape but it doesnt seem periodic.
do you think that this is correct. I have seen in some paper (for micro-channel) that the contour of air void fraction is periodic.
|Thread||Thread Starter||Forum||Replies||Last Post|
|slug flow simulation||abdoganawa||STAR-CCM+||0||March 6, 2013 02:20|
|About Some Concepts:Laminar flow, turbulent flow, steady flow and time-dependent flow||Jing||Main CFD Forum||5||March 2, 2013 15:02|
|Simulation of a complex wing in solidworks flow simulation||niels1900||FloEFD, FloWorks & FloTHERM||6||April 20, 2011 10:44|
|SLUG flow with Two fluid model and VOF||MIJAIL||Main CFD Forum||2||February 21, 2008 11:45|
|IC & BC for slug flow simulation||Pei-Ying Hsieh||Main CFD Forum||7||July 31, 2000 22:27|