CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Transient Simulation problem

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 4, 2014, 09:30
Default Transient Simulation problem
  #1
Member
 
Join Date: May 2014
Posts: 30
Rep Power: 8
mosef is on a distinguished road
Hey everybody.
I am simulating the melting of paraffin in a small capsule. The density of the solid is higher than the density of the liquid paraffin so it should sink to the bottom. This is not the problem, it works.
But:
After a while, there is no more a solid core in the capsule but a mushy phase. Not totally liquid and not totally solid. I don't understand this, because it should melt and sink down but there should me the whole time a solid core of paraffin. I compared my solution with literature and there is always a solid core until the end of the melting.
Any idea why I have NO solid core here??

Thx so much for your help!

P.S. blue = total solid, red = total liquid
Attached Images
File Type: jpg contactmelting.jpg (35.2 KB, 16 views)
mosef is offline   Reply With Quote

Old   September 10, 2014, 03:34
Default
  #2
Member
 
Join Date: May 2014
Posts: 30
Rep Power: 8
mosef is on a distinguished road
I think when I set the 'Flow Stop Solid Fraction' to 1,1 the solid paraffin can sink, but the programm thinks, that this is not longer a solid material but a liquid one.
Could this be the reason why I don't have a solid core then anymore?
How can I prevent that?
mosef 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
Transient simulation : Static temperature and time averaged static temperature saisanthoshm88 CFX 4 July 4, 2013 02:18
Boundary Conditions - Transient Simulation miki256 CFX 2 May 18, 2012 01:22
Inverse and Transient Heat Transfer Problem on commercial software: is it possible? rogbrito CFX 1 January 29, 2012 17:48
Star-CD transient simulation, problem of loss of mass kit STAR-CD 3 April 13, 2010 11:34
transient simulation: natural convection problem? Basics CFX 3 September 25, 2002 09:42


All times are GMT -4. The time now is 01:59.