CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

JANAF table

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

Like Tree5Likes
  • 1 Post By elvis
  • 2 Post By dkxls
  • 2 Post By dkxls

Reply
 
LinkBack Thread Tools Display Modes
Old   August 4, 2014, 16:25
Default JANAF table
  #1
New Member
 
zahra
Join Date: Jun 2014
Location: Iran-Tehran
Posts: 28
Rep Power: 5
zahraa is on a distinguished road
Hi,
look at this page: http://www.me.berkeley.edu/gri-mech/data/nasa_plnm.html
in this page, there is a link " NASA thermodynamic files ", is it the old version of JANAF table?
zahraa is offline   Reply With Quote

Old   August 5, 2014, 03:05
Default
  #2
New Member
 
zahra
Join Date: Jun 2014
Location: Iran-Tehran
Posts: 28
Rep Power: 5
zahraa is on a distinguished road
i want to use JANAF old version's data in thermophysical properties. no one knows?
zahraa is offline   Reply With Quote

Old   August 5, 2014, 04:19
Default
  #3
Senior Member
 
Elvis
Join Date: Mar 2009
Location: Sindelfingen, Germany
Posts: 596
Blog Entries: 5
Rep Power: 16
elvis will become famous soon enough
http://openfoamwiki.net/index.php/Main_Page searched for Janaf
http://openfoamwiki.net/index.php/Janaf hope this helps

searched for cantera
http://openfoamwiki.net/index.php/Ex...n/flameletFoam => there was a cool
presentation by Hagen Müller at OF Stammtisch in Kaiserlautern and this is his OFwiki page

http://openfoamwiki.net/index.php/Si...e_contribution

but this is not my world so sorry if links do not help you
zahraa likes this.
elvis is offline   Reply With Quote

Old   August 5, 2014, 05:21
Default
  #4
New Member
 
zahra
Join Date: Jun 2014
Location: Iran-Tehran
Posts: 28
Rep Power: 5
zahraa is on a distinguished road
Thank you elvis,
in http://openfoamwiki.net/index.php/Contrib/Janaf there is a useful link there, but unfortunately it is damaged!!
zahraa is offline   Reply With Quote

Old   August 5, 2014, 05:24
Default
  #5
Senior Member
 
dkxls's Avatar
 
Armin
Join Date: Feb 2011
Location: Helsinki, Finland
Posts: 156
Rep Power: 12
dkxls will become famous soon enough
You have already all the information in this link:
Quote:
Originally Posted by zahraa View Post
Admittedly, the naming of the thermodynamic data is rather confusing in literature and CFD-codes, especially in OpenFOAM.

To my understanding, the JANAF tables were one of the first collections of thermodynamic data (Cp, h, s) and therefore widely used as reference data.
Here the reference:
Chase, Malcolm W. NIST-JANAF Thermochemical Tables. Fourth Edition. Journal of Physical and Chemical Reference Data. Gaithersburg, MA: National Institute of Standards and Technology (NIST), 1998
http://kinetics.nist.gov/janaf/
http://kinetics.nist.gov/janaf/pdf/J...Vol1-Intro.pdf
http://kinetics.nist.gov/janaf/pdf/J...Vol2-Intro.pdf




What you are looking for is a polynomial representation of this thermodynamic data, very often referred to as the "NASA polynomials".
The most widely used version are the "7 term NASA polynomials" introduced in the 1960s.

A less common 9 term polynomial representation was then introduced in the 1990s, often called the "new NASA polynomials".
Probably the most extensive database, providing data in the 7 and 9 term polynomial format, is available here:
http://garfield.chem.elte.hu/Burcat/burcat.html

A very good summary and "history lesson" was given by Burcat and Ruscic (2005):
Burcat, Alexander, and Branko Ruscic. Third Millenium Ideal Gas and Condensed Phase Thermochemical Database for Combustion (with Update from Active Thermochemical Tables). Argonne National Laboratory (ANL), July 29, 2005. http://www.osti.gov/scitech/biblio/925269.

About the naming in OpenFOAM: I have no idea why they called them JANAF polynomials, when the rest of the world calls them NASA polynomials. But yes the janaf-class in OpenFOAM uses the 7 term NASA polynomial representation.
Also, I saw that you are interested in the GRI mechanism. I would recommend you to have a look at the chemFoam tutorials, as an example on how to use the GRI mech and thermo data:
Code:
 tutorials/combustion/chemFoam/gri
ayhan515 and zahraa like this.

Last edited by dkxls; August 5, 2014 at 07:34.
dkxls is offline   Reply With Quote

Old   August 5, 2014, 05:37
Default
  #6
Senior Member
 
dkxls's Avatar
 
Armin
Join Date: Feb 2011
Location: Helsinki, Finland
Posts: 156
Rep Power: 12
dkxls will become famous soon enough
Two more notes:
  1. The data provided with many combustion mechanisms in the CHEMKIN format, is mostly using the 7 term NASA polynomial representation for the thermo data.
  2. Quote:
    The 7 term polynomials actually include 15 constants. The first set of 7 constants belongs to the 1000-6000 K polynomial, the second set of 7 constants belongs to the 200-1000 K polynomial, and the fifteenth constant is H298/R ≡ ∆f H298/R. The latter value (and the corresponding position within the polynomial format) is not used by most other programs, such as CHEMKIN, and therefore does not interfere with their calculations.
    Burcat, Alexander, and Branko Ruscic. Third Millenium Ideal Gas and Condensed Phase Thermochemical Database for Combustion (with Update from Active Thermochemical Tables). Argonne National Laboratory (ANL), July 29, 2005. http://www.osti.gov/scitech/biblio/925269.
u22 and zahraa like this.
dkxls is offline   Reply With Quote

Old   August 5, 2014, 06:23
Default
  #7
New Member
 
zahra
Join Date: Jun 2014
Location: Iran-Tehran
Posts: 28
Rep Power: 5
zahraa is on a distinguished road
Extremely thankful Armin
zahraa is offline   Reply With Quote

Reply

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
Run time Selection Mechanism - Some help required to understand jaswi OpenFOAM Programming & Development 3 October 29, 2015 14:42
Problem in3D model processing mebinitap OpenFOAM 2 December 12, 2014 05:40
Installing OpenFoam on windows 7-64 Dadou OpenFOAM Installation on Windows, Mac and other Unsupported Platforms 10 February 11, 2014 17:20
Entropy calculation in OpenFoam immortality OpenFOAM 23 September 8, 2013 17:18
Table Manipulation furkan CD-adapco 0 April 4, 2006 10:23


All times are GMT -4. The time now is 02:20.