An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 3 Search : thermodynamic equilibrium
local thermodynamic equilibrium (LTE)
  ترازمندی ِ گرماتوانیک ِ محلی   
tarâzmandi-ye garmâtavânik-e mahali

Fr.: équilibre thermodynamique local   

The assumption that all distribution functions characterizing the material and its interaction with the radiation field at a point in the star are given by → thermodynamic equilibrium relations at local values of the temperature and density.

local; → thermodynamic; → equilibrium.

non-local thermodynamic equilibrium (NLTE)
  ترازمندی ِ گرماتوانیک ِ نامحلی   
tarâzmandi-ye garmâtavânik-e nâmahali

Fr.: hors équilibre thermodynamique local   

A physical condition in which the assumption of the → local thermodynamic equilibrium does not hold.

non-; → local thermodynamic equilibrium.

thermodynamic equilibrium
  ترازمندی ِ گرماتوانیک   
tarâzmandi-ye garmâtavânik

Fr.: équilibre thermodynamique   

The condition of a → thermodynamic system in which the available → energy is distributed uniformly among all the possible forms of energy. Furthermore, all → thermodynamic process es must be exactly balanced by their reverse processes. For example, inside a star there will be as many → ionizations of helium per second as there are → recombinations of free electrons and helium ions. Se also → local thermodynamic equilibrium (LTE).

thermodynamic; → equilibrium.