VOF Simulation

RAHULME · April 20, 2011, 03:55

I am simulating the falling film dynamics on horizontal cylinder. In that i have to model external flow on horizontal cylinders. There wiil be three modes have been expected for water viz. droplet sheet and jet. Then -----1.How to create droplets from water inlet in the domain , what boundary conditions should have to be used. 2.How film thickness around the cylinder should be measured

alastormoody11 · April 20, 2011, 06:29

As I understand it, you should use the VOF model in FLUENT and there is no need to create droplets(aka DPM), if you are using VOF and the falling film is in the droplet mode then the VOF model will form the droplets for you.

The meshing will be critical for a proper capture of such droplets, it should be fine enough.

Regarding the film thickness, wont it vary over the surface?

For getting a general idea you can plot an isosurface with something like a volume fraction of water =0.5.

RAHULME · April 21, 2011, 06:49

i am getting better insight afterimplimenting your suggestions i need your e mail id. steel i have problem in obtaining droplets

April 20, 2011, 03:55	VOF Simulation	#1
RAHULME New Member RAHUL SALUNKHE Join Date: Aug 2010 Location: SATARA MS Posts: 8 Rep Power: 15	I am simulating the falling film dynamics on horizontal cylinder. In that i have to model external flow on horizontal cylinders. There wiil be three modes have been expected for water viz. droplet sheet and jet. Then -----1.How to create droplets from water inlet in the domain , what boundary conditions should have to be used. 2.How film thickness around the cylinder should be measured

April 21, 2011, 06:49	Thanks	#3
RAHULME New Member RAHUL SALUNKHE Join Date: Aug 2010 Location: SATARA MS Posts: 8 Rep Power: 15	i am getting better insight afterimplimenting your suggestions i need your e mail id. steel i have problem in obtaining droplets

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mass conservation problem in mixing tank multiphase simulation	rockewan	FLUENT	0	April 6, 2010 12:34
Simulation of filling a pool by Vof	Asghari_M	FLUENT	8	February 16, 2010 02:30
FSI TWO-WAY SIMULATION	Smagmon	CFX	1	March 6, 2009 13:24
urgent query regarding vof model plz rply	Garima Chaudhary	FLUENT	0	July 13, 2007 02:20
vof simulation in batch mode	vof_grid	FLUENT	0	July 6, 2007 08:47

April 20, 2011, 06:29		#2
alastormoody11 Senior Member Join Date: Jun 2009 Posts: 100 Rep Power: 16	As I understand it, you should use the VOF model in FLUENT and there is no need to create droplets(aka DPM), if you are using VOF and the falling film is in the droplet mode then the VOF model will form the droplets for you. The meshing will be critical for a proper capture of such droplets, it should be fine enough. Regarding the film thickness, wont it vary over the surface? For getting a general idea you can plot an isosurface with something like a volume fraction of water =0.5.