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

Incorrect Specific Heat Value when I used a Polynomial or the Kinetic Theory

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 26, 2021, 14:47
Default Incorrect Specific Heat Value when I used a Polynomial or the Kinetic Theory
  #1
Member
 
CWL
Join Date: Nov 2015
Posts: 58
Rep Power: 10
cwl6750084 is on a distinguished road
I tried to insert the constant pressure specific heat of water vapour along the saturation curve from the steam table. However, the values computed from Fluent is about 300 J/kg-K higher than values given by the steam table. I switched to the piecewise-liner option and inputted the tabulated values, the same happens.



Moreover, when I used the kinetic theory for specific heat. I used 9 as the degree of freedom for water. However, now, the computed specific is too small and I have to use 12 as the degree of freedom in order to obtain the correct values. Is Fluent counting the degree of freedom the same way as in Physical Chemistry textbook?



Any assistances are appreciated. Thanks.
cwl6750084 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
Continuity Equation for multicomponent simulation lordluan CFX 15 May 19, 2020 19:36
Domain Reference Pressure and mass flow inlet boundary AdidaKK CFX 75 August 20, 2018 06:37
Difficulty In Setting Boundary Conditions Moinul Haque CFX 4 November 25, 2014 18:30
poor calculation with temparture-dependant specific heat ryanmoser FLUENT 3 January 3, 2013 02:32
Polynomial coefficients for specific heat of Ideal gas avi031 Main CFD Forum 0 November 11, 2011 01:28


All times are GMT -4. The time now is 16:17.