Prandtl number


Prandtl number
Prandtlio skaičius statusas T sritis chemija apibrėžtis Medžiagos kinematinės klampos ir difuzijos koeficiento santykis. atitikmenys: angl. Prandtl number rus. критерий Прандтля; число Прандтля

Chemijos terminų aiškinamasis žodynas – 2-asis patais. ir papild. leid. – Vilnius: Mokslo ir enciklopedijų leidybos institutas. . 2003.

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  • Prandtl number — The Prandtl number mathrm{Pr} is a dimensionless number approximating the ratio of momentum diffusivity (kinematic viscosity) and thermal diffusivity. It is named after the German physicist Ludwig Prandtl.It is defined as::mathrm{Pr} = frac{… …   Wikipedia

  • Prandtl number — Prandtlio skaičius statusas T sritis fizika atitikmenys: angl. Prandtl number vok. Prandtl Zahl, f rus. число Прандтля, n pranc. nombre de Prandtl, m …   Fizikos terminų žodynas

  • Prandtl number — Prandtlio skaičius statusas T sritis Standartizacija ir metrologija apibrėžtis Judesio kiekio ir šilumos pernašos skaičiavimams vartojamas nedimensinis dydis, išreiškiamas skysčio arba dujų kinematinės klampos ir molekulių difuzijos koeficiento… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • prandtl number — ˈpräntəl noun Usage: usually capitalized P Etymology: after Ludwig Prandtl died 1953 German physicist; translation of German Prandtlsche zahl : the ratio of the product of the coefficient of viscosity and the specific heat at constant pressure to …   Useful english dictionary

  • Prandtl number — /prahn tl/, Physics, Thermodynam. the ratio of the fluid viscosity to the thermal conductivity of a substance, a low number indicating high convection. [1930 35; named after Ludwig Prandtl (1875 1953), German physicist] * * * …   Universalium

  • Prandtl number — Смотри число Прандтля (Pr) …   Энциклопедический словарь по металлургии

  • Turbulent Prandtl number — The turbulent Prandtl number (Pr t) is a non dimensional term defined as the ratio between the momentum eddy diffusivity and the heat transfer eddy diffusivity. It is useful for solving the heat transfer problem of turbulent boundary layer flows …   Wikipedia

  • Magnetic Prandtl number — The Magnetic Prandtl number is a dimensionless quantity occurring in magnetohydrodynamics which approximates the ratio of momentum diffusivity (viscosity) and magnetic diffusivity. It is defined as: where: Rem is the magnetic Reynolds number Re… …   Wikipedia

  • Prandtl-Zahl — Prandtlio skaičius statusas T sritis fizika atitikmenys: angl. Prandtl number vok. Prandtl Zahl, f rus. число Прандтля, n pranc. nombre de Prandtl, m …   Fizikos terminų žodynas

  • Prandtl-Meyer function — describes the angle through which a flow can turn isentropically for the given initial and final Mach number. It is the maximum angle through which a sonic (M = 1) flow can be turned around a convex corner. For an ideal gas, it is expressed as… …   Wikipedia


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