[zahraa]

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]

i want to use JANAF old version's data in thermophysical properties. no one knows?

[elvis]

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]

Thank you elvis,
in http://openfoamwiki.net/index.php/Contrib/Janaf there is a useful link there, but unfortunately it is damaged!!

[dkxls]

You have already all the information in this link:

Originally Posted by zahraa

look at this page: http://www.me.berkeley.edu/gri-mech/data/nasa_plnm.html

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:

 tutorials/combustion/chemFoam/gri

[dkxls]

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. 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.

[zahraa]

Extremely thankful Armin