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

icoUncoupledKinematicParcelFoam stick particles

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 23, 2014, 09:37
Default icoUncoupledKinematicParcelFoam stick particles
  #1
New Member
 
Giulio
Join Date: Apr 2014
Location: Milano
Posts: 17
Rep Power: 11
LaSerpe is on a distinguished road
Hi everybody,

I'm using icoUncoupledKinematicParcelFoam to compute water droplets impingement above planes.
My problem is that the output file named "position", which as far as I know tells you the label of the cell where the particle hit the wall, says that the droplet is in a cell which doesn't have a face that belongs to a wall.
In other word many droplets hit the wall but they're not in a cell near it.

How is it possible?
I tried to change mesh and change the integration time step in the controldict dictionary but nothing worth it.
CheckMesh anyway is OK, if I run with -allGeometry Face Tets is OK but I get 1 fail due to small determinant.

the geometry is an half-wing in a test tunnel and the solver is running with a stick condition for the particles

Giulio
LaSerpe is offline   Reply With Quote

Old   April 30, 2014, 05:35
Default
  #2
New Member
 
Giulio
Join Date: Apr 2014
Location: Milano
Posts: 17
Rep Power: 11
LaSerpe is on a distinguished road
Maybe someone knows how "stick" condition is verified by the solver?

I always though that a "stick" particle is an element which hit a wall, but could it mean that the particle is trapped in a cell, with no possibility of escaping from there?
(maybe a cell with velocity magnitude equal to 0, in which the particles gets into with a very low speed)

In this latter case the solution of my problem could be found by looking at the wall function I'm using.
I searched on many threads but I couldn't find an answer for this.

Giulio
LaSerpe is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
forced to stick of soot particles kmgraju CFX 9 April 12, 2017 04:38
trying to simulate two-phase jet flow with particles in surface injection ajkratos FLUENT 5 March 3, 2015 22:33
Particles don't stick to the wall with stick BC preichl OpenFOAM 2 December 13, 2010 10:06
How can i get my particles to stick? zmaxcomputer ANSYS 15 September 7, 2010 08:02
Stick criteria for particles Xubin FLUENT 0 January 11, 2002 10:29


All times are GMT -4. The time now is 14:34.