Maximum temperature in a lubricant. An oil is acting as a lubricant for a pair of cylindrical surfaces such as those shown in Fig. 10.4-1. The angular velocity of the outer cylinder is 7908 rpm. The outer cylinder has a radium of 5.06 cm, and the clearance between the cylinders is 0.027 cm. What is the maximum temperature in the oil if both wall temperatures are known to be 158F? The physical properties of the oil are assumed of the oil are assumed constant at the following values: Viscosity = 92.3 cp Density = 1.22 g/cm^3 Thermal conductivity: 0.0055 cal/s cm C.