|
[Sponsors] |
poor calculation with temparture-dependant specific heat |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
December 30, 2012, 04:29 |
poor calculation with temparture-dependant specific heat
|
#1 |
New Member
Moser
Join Date: Dec 2010
Posts: 12
Rep Power: 16 |
I am trying to simulate the melting process with the method of effective heat capacity, which requires FLUENT to solve energy equations with changing specific heat. I wrote a udf to specify the specific heat. However, it doesn't help. Temperature rising rate is far beyond what it should be.
Then I tried to work with the constant specific heat, and the result was more acceptable, but not precise enough. Could anyone tell me what should I be aware of to improve the iteration stability and precision with temperature-dependent property? Thank you so much! |
|
January 2, 2013, 09:43 |
|
#3 |
Member
Join Date: Dec 2012
Posts: 92
Rep Power: 14 |
Did you consider setting the enthalpy, too? This was a problem in my first simulations with temperature-dependent Cp.
|
|
January 3, 2013, 02:32 |
|
#4 |
Senior Member
SSL
Join Date: Oct 2012
Posts: 226
Rep Power: 15 |
Yes, You should also decrease energy URF.
|
|
Tags |
temperature dependence |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
mass flow in is not equal to mass flow out | saii | CFX | 12 | March 19, 2018 06:21 |
Radiation interface | hinca | CFX | 15 | January 26, 2014 18:11 |
Enforce bounds error with heat loss boundary condition at solid walls | Chander | CFX | 2 | May 1, 2012 21:11 |
error message | cuteapathy | CFX | 14 | March 20, 2012 07:45 |
Integral specific heat | Steve Amphlett | Main CFD Forum | 0 | August 25, 2000 10:51 |