CFD Online Logo CFD Online URL
Home > Forums > FLUENT

melting in horizontal shell in tube, need help friends

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

LinkBack Thread Tools Display Modes
Old   January 9, 2014, 18:33
Question melting in horizontal shell in tube, need help friends
Join Date: Jan 2014
Location: Turkey
Posts: 37
Rep Power: 6
thermal energy is on a distinguished road
dear friends,

ı have a problem. problem is that

ı simulate melting for horizontal shell in tube (annulor). boundry conditions are that isothermal condition at the inner surface of the annulus and the adiabatic condition at the outer surface of annulus.
ı used simple algorithm (pressure based solver and transient).
As a spatial discretization, ı used least squares cell based, presto, power law and power law for gradient, pressure, momentum and energy respectively.

as an phase change material ı used paraffin (melting range Tm=56-58). paraffin properties are that ı used boussinessq mean (solid and liquid) density value ,constant cp, k, viscosity and thermal expansion coefficient. also, ı used melting point instead of range , Tm=57.

my geometry dimensions are like that; inner diameter is 28mm and outer diameter is 110mm. ı simulate only half of the annulor (symmetry condition).

my melting simulation is mentioned above. but solution is not good. that is my experimental data and simulated data do not have good agreement as a characteristic of figure. the figure is attached (T14 is temperature of pcm which is in lower part of annulor).

why does this difference occur?

any suggestion?
ı am really in need of help
Attached Images
File Type: jpg exp num.JPG (90.1 KB, 10 views)

Last edited by thermal energy; January 10, 2014 at 07:30.
thermal energy is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
shell and tube heat exchanger samidabest FLUENT 0 January 8, 2013 04:26
Need Help in simulating shell and tube heat exchnger ehsanakrami FLUENT 3 August 24, 2012 05:40
condensation on horizontal tube??? Wikie FLUENT 0 July 30, 2010 04:53
liquid piston in horizontal tube Allen_Lin FLUENT 0 May 30, 2009 03:47
How to simulate 3D shell and Tube heat Exchanger san FLUENT 2 February 22, 2006 06:44

All times are GMT -4. The time now is 10:05.