CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

Initialization of DPM particles for transient simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 6, 2022, 04:34
Default Initialization of DPM particles for transient simulation
  #1
New Member
 
Benjamin Ortner
Join Date: Oct 2021
Location: Graz, Austria
Posts: 4
Rep Power: 3
ortb is on a distinguished road
Hello,


my job is to investigate transient effects within a pulverized fuel combustion case.
My previous approach was to start from a converged steady state case, switch to transient and just let the simulation run. The problem is, as the domain is very large, it takes an awful amount of time steps until the domin is filled up with particles and a "steady state" is reached. I am not interested in the initial ignition.


Is there an efficient way to initialize particles (position, velocity, mass, diameter, volatile component etc.) in a transient simulation? I read about initializing from a file, but that seemingly does not allow all necessary parameters.

Thank you for your advice!

Regards
Benni
ortb is offline   Reply With Quote

Old   July 9, 2022, 16:57
Default
  #2
Senior Member
 
alainislas's Avatar
 
Alain Islas
Join Date: Nov 2019
Location: Mexico
Posts: 101
Rep Power: 5
alainislas is on a distinguished road
You are right, when solving reacting dpm cases in Fluent, it looks like only the non-reacting properties can be used in the file-injection (see pic). This is a problem that I have faced as well.
As of now, at least this metthod is better than injecting the particles from the inlet and waiting for them unitl they travel all throughout the domain.
Attached Images
File Type: jpg NQ273W9ITZZE.jpg (67.3 KB, 10 views)
alainislas is offline   Reply With Quote

Reply

Tags
dpm, initialisation, initialization, particle, udf

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
UDF in case with DPM modle POSTHU Fluent UDF and Scheme Programming 0 March 3, 2021 08:21
Counting Particles in Transient Simulation Nuuu CFX 14 October 8, 2020 19:19
finite values inside the simulation domain with hybrid initialization at t =0 sgbaek FLUENT 0 February 15, 2018 19:45
spray simulation with heat transfer using DPM Tensian Fluent Multiphase 1 June 7, 2016 05:57
Unsteady Injection (DPM) for certain amount of particles Gold FLUENT 0 October 18, 2011 14:15


All times are GMT -4. The time now is 19:25.