Velocity distribution in a boundary layer is given by $\frac{u}{U_{\infty}}=\sin \left(\frac{\pi}{2} \frac{y}{\delta}\right),$ where $u$ is the velocity at vertical coordinate $y, U_{\infty}$ is the free stream velocity and $\delta$ is the boundary layer thickness. The values of $U_{\infty}$ and $\delta$ are $0.3 \mathrm{~m} / \mathrm{s}$ and $1.0 \mathrm{~m}$, respectively. The velocity gradient $\left(\frac{\partial u}{\partial y}\right)$ (in $\mathrm{s}^{-1}$, round off to two decimal places) at $y=0,$ is

Question ID - 157340 | SaraNextGen Top Answer

Velocity distribution in a boundary layer is given by $\frac{u}{U_{\infty}}=\sin \left(\frac{\pi}{2} \frac{y}{\delta}\right),$ where $u$ is the velocity at vertical coordinate $y, U_{\infty}$ is the free stream velocity and $\delta$ is the boundary layer thickness. The values of $U_{\infty}$ and $\delta$ are $0.3 \mathrm{~m} / \mathrm{s}$ and $1.0 \mathrm{~m}$, respectively. The velocity gradient $\left(\frac{\partial u}{\partial y}\right)$ (in $\mathrm{s}^{-1}$, round off to two decimal places) at $y=0,$ is