CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

One-way /two way coupling for particle

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

LinkBack Thread Tools Display Modes
Old   March 31, 2015, 15:21
Post One-way /two way coupling for particle
New Member
Join Date: Mar 2012
Location: France
Posts: 9
Rep Power: 5
djfanf is on a distinguished road
Hello everybody,

I am trying to simulate a flow with particle and a volume fraction of 4,3x10e-4. I just want to know which model I have to use, one way or two way coupling?
I make some research and find some different rules, for example that for a volume fraction higher that 10e-6 the two way coupling should be used. Does someone know if this is right?

djfanf is offline   Reply With Quote

Old   March 31, 2015, 15:32
Senior Member
Michael Prinkey
Join Date: Mar 2009
Location: Pittsburgh PA
Posts: 116
Rep Power: 12
mprinkey will become famous soon enough
It also a function of the relative densities of the two phases. If the solids phase is very dense relative to the fluid phase, even a fairly low solids volume fraction mixture will cause serious changes to the gas flow. Relative velocity of the phases is also potentially importance as the drag force increasely superlinearly with relative velocity.

I am not an expert in this area, but I'd recommend that you look at the momentum equations for the two phases. Throw out all of the terms except inertia and drag and look at the relative magnitude of those terms with representative flow conditions inserted. That should allow you to see which phase is driving the other or if the dynamics of both are coupled strongly to each other.
mprinkey is offline   Reply With Quote

Old   April 5, 2015, 03:40
New Member
Join Date: Mar 2012
Location: France
Posts: 9
Rep Power: 5
djfanf is on a distinguished road
thanks a lot,
I will take a look at the momentum equation, I think I will have to use the two way coupling because of the high mass loading of my flow (around 100%).
djfanf is offline   Reply With Quote


particle, way-coupling

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
FSI problem with system coupling: Fail to couple FLUENT sophieUNSW FLUENT 2 May 1, 2014 20:30
Remeshing_ ANSYS 14.0_ System Coupling acdesa ANSYS 3 February 25, 2013 11:09
Simple Behavioural Models: Fluid Coupling Chromatix Main CFD Forum 0 February 20, 2010 17:17
What is weakstrong coupling in FSI problems hajo OpenFOAM Running, Solving & CFD 5 May 15, 2008 01:45
one/two way coupling of DPM Angela FLUENT 3 April 28, 2008 09:29

All times are GMT -4. The time now is 11:22.