Radiation Constants

Overview

Engineering reference data for Radiation Constants in basics.

Key Formulas

Ohm's Law

$V = IR$

Voltage = Current × Resistance.

Newton's Second Law

$F = ma$

Force = mass × acceleration.

Conservation of Energy

$E_{in} = E_{out} + \Delta E_{stored}$

Energy balance.

Variables

Symbol	Description	Unit
$V$	Voltage	V
$I$	Current	A
$R$	Resistance	Ω
$F$	Force	N
$m$	Mass	kg
$a$	Acceleration	m/s²

Radiation Constants Data

The following table provides the radiation constant values and corresponding emissivity coefficients for common building and engineering materials.

Radiation Constant Definition

The radiation constant is a material-specific property used in radiative heat transfer calculations. It is defined as the product of the Stefan-Boltzmann constant (σ) and the emissivity coefficient (ε) of a surface.

The fundamental relationship is:

$$\text{Radiation Constant} = \sigma \cdot \varepsilon$$

Where:

• σ is the Stefan-Boltzmann constant.
• ε (epsilon) is the emissivity of the material. It is a dimensionless number between 0 and 1, where *ε = 1 describes a perfect emitter or "black body."

Interactive Charts

References

• Original Source