Chapter 8, Problem 8.6P

Consider pressurized water, engine oil (unused), and NaK $\left(\text{22}\%/\text{78}\%\right)$ flowing in a 20-mm-diameter tube.

(a) Determine the mean velocity, the hydrodynamic entry length, and the thermal entry length 11r each of the fluids when the fluid temperature is 366 K and the flow rate is $0.0\text{1 kg}/\text{s}$ .

(b) Determine the mass flow rate, the hydrodynamic entry length, and the thermal entry length for water and engine oil at 300 and 400 K and a mean velocity of $0.0\text{2 m}/\text{s}$ .