CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

DPM steady simulation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   July 6, 2015, 05:46
Default DPM steady simulation
S. Morichika
Join Date: Aug 2014
Posts: 62
Rep Power: 11
Saidul is on a distinguished road
I am using FLUENT to simulate particle movement and deposition. My case is steady laminar. I am bit confuse about some results. I have just started with steady simulation. Suppose I have injected 800 particle by using inlet nodes and results show after 1 iteration 747 particles are trapped. But after 3000 iteration only 3 particles are trapped. Could anyone please explain, what is the meaning of iteration here? Why the number of trapped particles are decreasing when increasing the iteration. I found that after 14/15 iteration, number of trapped particles reduced significantly. What is the explanation for this types of results.

Thanks in advance. I am keen to know the basic about steady laminar simulation and iteration.

Thank you very much.

S. I.
Saidul is offline   Reply With Quote

Old   July 6, 2015, 08:07
edoan's Avatar
Ethan Doan
Join Date: Oct 2012
Location: Canada
Posts: 90
Rep Power: 13
edoan is on a distinguished road
Hi Saidul, DPM works by solving the fluid flow then injecting the particles into that flow and using the flow to move the particles (if two way coupled then particles also have effect on flow via momentum source in next fluid set of iterations). To avoid an infinite loop where a particle is stuck recirculating forever the DPM calculation only proceedes for as long as you let it. In the DPM window you can control this by changing the tracking parameters. My suggestion for steady state DPM is converge the fluid flow completely without turning on DPM then turn on DPM injections and change the tracking paramters until number of incomplete tracks = 0 (escape + trapped +etc = injected)
Best of luck, hope this cleared somethings up for you
edoan is offline   Reply With Quote


iterations, laminar flow, steady simulation

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
Averaging during a steady state simulation say CFX 3 November 3, 2015 09:18
DPM Simulation with Wet Steam AbbasRahimi Fluent Multiphase 1 June 16, 2015 08:19
Transient features in steady state simulation? PedFr0 Main CFD Forum 16 October 10, 2013 07:17
DPM simulation convergence problem gemini FLUENT 2 May 22, 2012 01:41
DPM Steady formulation with collisions kulwinder FLUENT 0 May 22, 2004 18:44

All times are GMT -4. The time now is 10:54.