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Air-particle collision frequency

Values for calculation

$σ$ $\mathrm{m}$
$N_A$ $\mathrm{kmol^{-1}}$
$R^*$ $\mathrm{J\cdot K^{-1}\cdot kmol^{-1}}$
$M$ $\mathrm{kg\cdot kmol^{-1}}$
$p_{air}$ $\mathrm{Pa}$
$T$ $\mathrm{K}$

Calculation

Air-particle collision frequency

$$ω=4\cdot σ^2\cdot N_A \cdot\sqrt{\cfrac{π}{R^*\cdot M}}\cdot\cfrac{p_{air}}{\sqrt{T}}$$