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空気 prandtl number 粘度 熱容量 熱伝導率

Reference data と engineering information about 空気 prandtl number 粘度 熱容量 熱伝導率 for 熱伝達 applications.

airprandtlnumberviscosity計算機データ表

Overview

Engineering reference data for Air Prandtl Number Viscosity Heat Capacity Thermal Conductivity in heat transfer.

Key Formulas

Fourier's Law

q=kTq = -k \nabla T

Heat flux proportional to temperature gradient.

Convective Heat Transfer

Q=hA(TsT)Q = hA(T_s - T_\infty)

Heat transfer between surface and fluid.

Stefan-Boltzmann Law

q=εσT4q = \varepsilon \sigma T^4

Radiative heat flux from a surface.

Thermal Resistance

Rth=LkAR_{th} = \frac{L}{kA}

Resistance to heat conduction.

Variables

SymbolDescriptionUnit
qqHeat fluxW/m²
kkThermal conductivityW/(m·K)
hhConvection coefficientW/(m²·K)
TTTemperatureK
ε\varepsilonEmissivity
σ\sigmaStefan-Boltzmann constant5.67×10⁻⁸ W/(m²·K⁴)

References