For 15◦C water flowing in the annular region specified in Problem 17.12, determine what maximum water velocity can be obtained if the flow is to be laminar.
Problem 17.12
Water, at 15°C, flows in an annular space between two concentric pipes. The inner and outer diameters of the annular region are 7.5 cm and 11.5 cm, respectively. (a) Determine the volumetric flow rate, in m3/s, that will be achieved for a water velocity of 3 m/s and (b) specify whether this flow is laminar or turbulent.
