Stefan-Boltzmann constant

Stefan-Boltzmann constant

[′shte‚fän ′bōlts‚män ‚kän·stənt]
(statistical mechanics)
The energy radiated by a blackbody per unit area per unit time divided by the fourth power of the body's temperature; equal to (5.6696 ± 0.0010) × 10-8(watt)(meter)-2(kelvin)-4.
References in periodicals archive ?
1] is the Stefan-Boltzmann constant which characterizes the equilibrium thermal radiation of the <<metallic plasma>> in the EE region.
where [rho]n = N/V, N is the number of molecules in the gas, V is the volume, a = 4[sigma]/c is the radiation constant, k is the Boltzmann constant, [sigma] is the Stefan-Boltzmann constant, T is the temperature, and c the speed of light.
p] is the heat capacity, h is the convection heat transfer coefficient, A is the surface area, T is the component temperature, [sigma] is the Stefan-Boltzmann constant, e is the emissivity, and [k.
2]), [sigma] is the Stefan-Boltzmann constant, and T is the temperature of the black body (K), which is equal to the observed temperature.
The thickness of the thermal boundary layer increases on increasing the radiation parameter because the intensity of the electromagnetic radiation in the medium decreases and the Stefan-Boltzmann constant of the medium increases.
0] are the Stefan-Boltzmann constant and base temperature constant, respectively, as given in Eq.
b] is the bulk temperature that is the average temperature of the nanofluid, [sigma]* and k* are Stefan-Boltzmann constant and mean absorption coefficient, respectively.
volumetric coefficient of expansion with concentration [mu] coefficient of viscosity [upsilon] kinematic viscosity [sigma] Stefan-Boltzmann constant [[tau].
EAM] (set to 1) is the nondimensional radiant view factor at the tympanic membrane and again denotes the Stefan-Boltzmann constant.
amb] is the ambient temperature, R is a characteristic length, [epsilon] is the surface emissivity, and [sigma] is the Stefan-Boltzmann constant.
Coblentz was especially prolific, working to measure the Stefan-Boltzmann constant (123) using an early precursor for absolute detectors (121).