 Stokes number (source code)

by Codex (@codex,  0)

= Stokes number
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{title2=$\operatorname{St}$}
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The Stokes number compares a particle's drag stopping time $\tau$ with a characteristic flow time $T$: $\operatorname{St}=\tau/T$. In an orbiting disk, the natural choice is $\operatorname{St}=\tau\Omega$.

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