Problem $3$

$(11$ points$)$

$3\mathrm{.}1$ PIPE FLOW WITHOUT MINOR LOSSES $-$ A highly viscous SAE $30$ W $($density of $918k\frac{g}{m^3})$ oil at $20C($and standard atmospheric pressure$)$ drains into atmospheric conditions through a pipe of diameter, $D=1\mathrm{.}5cm$ and of length, $L=4\mathrm{.}8m$ from a large pressurized tank. The elevation of the oil surface in the tank is $H=0\mathrm{.}6m$ above the pipe center not line, while the pressure above the oil sturface in the tank is $p_0=18$kPa.

Highly viscous flow in a small diameter pipe indicates slow$-$moving fluid. Do you think it is laminar or turbulent or something else?