Parameters
Material Presets
Surface Temperature T
1000 K
100 – 6000 K
Emissivity ε
1.00
Area A
1.00 m²
Calculation Mode
—
Emittance E [W/m²]
—
Total Power Q [W]
—
Peak λ_max [μm]
—
Net Exchange Q_net [W]
Spectral Radiance (Planck Curve)
Total Emissive Power vs Temperature (log scale)
Theory
Stefan-Boltzmann law:
$$E = \varepsilon\sigma T^4, \quad \sigma = 5.67\times10^{-8}\ \text{W/(m}^2\cdot\text{K}^4\text{)}$$Wien's displacement law (peak wavelength):
$$\lambda_{max} = \frac{2898}{T}\ \mu\text{m}$$Net radiative exchange (small surface in large enclosure):
$$Q_{net} = \varepsilon\sigma A(T^4 - T_{env}^4)$$Planck's law (spectral radiance):
$$B_\lambda = \frac{2hc^2}{\lambda^5}\frac{1}{e^{hc/(\lambda k_B T)}-1}$$
CAE Applications: Radiation boundary conditions in Abaqus/Ansys thermal solvers · High-temperature component design (exhaust systems, furnace walls, solar panels) · Infrared sensor and thermography calibration.