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: 5 Search : polytropic
polytropic
  بُلگشتی   
bolgašti

Fr.: polytropique   

1) Math.: Describing a function which has different values for one variable.
2) Thermodynamics: Pertaining to pressure and volume change that maintains specific heat. → polytropic process.

poly- + → -tropic.

polytropic change
  دگرشد ِ بُلگشتی، دگرش ِ ~   
degaršod-e bolgašti, degareš-e ~

Fr.: changement polytropique   

A change in the → pressure or → volume of a → gas in a → polytropic process.

polytropic; → change.

polytropic gas
  گاز ِ بُلگشتی   
gâz-e bolgašti

Fr.: gaz polytropique   

A gas capable of undergoing a → polytropic process.

polytropic; → gas.

polytropic index
  دیشن ِ بُلگشت   
dišan-e bolgašt

Fr.: index polytropique   

A number appearing in the equation describing a → polytropic process.

polytropic; → index.

polytropic process
  فراروند ِ بُلگشتی   
farâravand-e bolgašti

Fr.: processus polytropique   

A thermodynamic process that obeys the relation: PVn = C, where P is pressure, V is volume, n is any real number, called the → polytropic index, and C is a constant.
If n = 0, then P = C and it is an → isobaric process.
If n = 1, then for an → ideal gas PV = NkT = C and it is an → isothermal process.
If n = γ, → adiabatic index, then for an ideal gas it is an → adiabatic process.

polytropic; → process.