[CIG-LONG] Material parameters: alpha, beta?

[Eunseo Choi]

Dear Jean,

I assume you are asking about alpha and beta among the SNAC's input 
parameters.

alpha is the volumetric thermal expansion coefficient and
beta is the parameter for pressure-dependence of density.
In SNAC, temperature and pressure-dependent density is given by
rho = rho_0 * (1.0 - alpha * 
(element->tetra[tetra_I].avgTemp-material->reftemp) + beta * pressure);
(see the last part of Snac/libSnac/src/Stress.c).

Eunseo


Jean Liu wrote:
> Hi!
>
> I was wondering if anyone knew what the material parameters alpha and  
> beta represent?
>
> Thanks!
>
> - Jean
>
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> CIG-LONG at geodynamics.org
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>   


-- 
=====================================
Eunseo Choi
Post-Doctoral Research Scientist

Lamont-Doherty Earth Observatory
305c Oceanography
P.O. Box 1000
61 Rt. 9W
Palisades, NY 10964-8000

http://www.ldeo.columbia.edu/~echoi
Phone: 845-365-8813 Fax: 845-365-8156
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