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

Particle melting during flight

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

Like Tree1Likes
  • 1 Post By EllenW

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 24, 2009, 11:56
Default Particle melting during flight
  #1
New Member
 
Ellen
Join Date: Mar 2009
Posts: 11
Rep Power: 16
EllenW is on a distinguished road
Hi,

I'm trying to model a problem where solid particles are injected into a continuous high-temperature flow, and then may melt during the flight. but if I select the inert particle in the DPM model, the solver would not include the latent heat term. so I'm wondering if any of you could kindly give me an idea how to include this particle melting part in udf, or if there's other way to do that?

Thank you very much!

Regards,
Ellen
EllenW is offline   Reply With Quote

Old   March 24, 2009, 13:50
Default
  #2
Member
 
Allan Walsh
Join Date: Mar 2009
Posts: 56
Rep Power: 17
Allan Walsh is on a distinguished road
One simplification would be to artificially increase the specific heat of your particle material so that as it heats to temperature T, the energy would be accounted for - sort of.
You could choose the built-in evaporation law and put in the appropriate latent heat.
I generally advise people away from UDFs because it is a steep learning curve to get anything useful. However, if you are comfortable with them, it is certainly an option.
Allan Walsh is offline   Reply With Quote

Old   March 24, 2009, 15:12
Default
  #3
New Member
 
Ellen
Join Date: Mar 2009
Posts: 11
Rep Power: 16
EllenW is on a distinguished road
Thank you for your answering my question, Allan. But I'm still not sure how to do that. If I were to enable the evaporation law, I need to select "droplet" as my particle type, right? then I need to supply all the properties like vapor pressure, also I'm asked to provide the evaporating species. But my particles are solid, I don't have the required input. Could you please elaborate your method a little more? Thanks a lot.

Ellen
qinchangliang likes this.
EllenW 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
Is UDF the only way to handle particle melting? marq FLUENT 3 February 23, 2008 02:48
Particle track files Sankalp CFX 1 August 26, 2004 00:25
the separated particle temperature in cyclone mkuswadi FLUENT 0 December 17, 2003 09:25
Iclude particle diameter effect in wall? yueroo FLUENT 0 April 14, 2001 04:56
Particle Trajectory calculation when particle hit yueroo FLUENT 2 February 28, 2001 05:26


All times are GMT -4. The time now is 04:52.