Problem 2.246

Making use of Poiseuille's equation $(1.7 \mathrm{~d}),$ find the mass $\mu$ of gas flowing per unit time through the pipe of length $l$ and radius $a$ if constant pressures $p_{1}$ and $p_{2}$ are maintained at its ends.

\mu=\frac{\pi a^{4} M}{16 \eta R T} \frac{\left|p_{2}^{2}-p_{1}^{2}\right|}{l}

Transport Phenomena