Heat transfer in a hollow fiber blood flows through a hollow fiber with an inside diameter of 100 mm and outside diameter of 120 mm. the blood is cooled by blowing air at a lower temperature across the outside surface of the fiber. the thermal conductivity of the fiber is 2 104 kw/m c. compute the overall heat transfer coefficient uo of the fiber based on the outside radius if: (a) all the thermal resistance is in the fiber wall. (b) the heat transfer coefficient between blood and the inside fiber wall is given by (8.35) and the heat transfer coefficient between air and the outside surface of the fiber is given by (8.47). use kblood 1⁄4 0.633 w/m k and kair 1⁄4 0.0262 w/m k, reynolds number for air 1⁄4 200,000 and prair 1⁄4 0.7. how much error is introduced by assuming that all of the thermal resistance is in the fiber wall?