Question: Consider fully developed laminar flow between symmetrically heated parallel plates with constant heat rate per unit of duct length. The plate spacing is 1cm, the fluid is an aircraft engine oil, and the heat flux is 1.4 kW/m2. The mass velocity G is 600 kg/(s· m2), At a particular point in question the surface temperature is 110°C. Assuming that the viscosity is the only temperature-dependent property of significance, carry out the necessary calculations (numerical integration is necessary) to evaluate the friction coefficient and the heat-transfer conductance. Compare the results with the recommended procedures given in the text.