Calculation of momentum flux

Input(s)

$\mu$: Fluid Viscosity $(\mathrm{cP})$

$\boldsymbol{d} \boldsymbol{v}_{\boldsymbol{x}}$: Change in Velocity in the $\mathrm{x}$-direction $(\mathrm{ft} / \mathrm{s})$

$d y$: Plate Separation in the $y$-direction (ft)

Output(s)

$\boldsymbol{\tau}_{y x}$: Momentum Flux $\left(\mathrm{lb} \mathrm{f} / \mathrm{ft}^{2}\right)$

Formula(s)

$$ \tau_{y x}=-\left(2.0886 * 10^{-5}\right) * \mu * \frac{d v_{x}}{d y} $$

Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second ed.). John Wiley \& Sons, Chapter: 1, Page: 15.