辐射-对流热平衡

由表面温度、环境温度、发射率和对流 h 比较辐射与对流热量贡献。

visual calculator传热

先看流动形态，再相信数字。

该工具把 CFD 设置转换为工况、尺度和主导效应提示。调节下方计算器，观察动态图与计算结果如何一起变化。

输入尺度

模型

判断

radiationconvectionheat balancethermal boundary condition

公式

KaTeX rendered

\begin{aligned}\text{Q\_rad = epsilon sigma A (T\_s\^{}4 - T\_sur\^{}4)}\\[0.35em]\text{Q\_conv = h A (T\_s - T\_inf)}\end{aligned}

ASCII source

Q_rad = epsilon sigma A (T_s^4 - T_sur^4), Q_conv = h A (T_s - T_inf)

emissivitysurface T (K)surrounding T (K)area (m2)h conv (W/m2/K)

radiation533.43 W

convection624.00 W

Q_rad (W)

533.427

Q_conv (W)

624.000

Q_total (W)

1157.427

radiation share

46.09%

Radiation becomes nonlinear fast. This helps decide whether a CFD thermal boundary can ignore surface-to-ambient radiation.