E Xample Given Experimental results for measured local heat transfer coefficient h for flow over a flat plate with a rough sur face where: a=coefficient h,(x)=ax 0.3 x= distance from leading edge Find expression for average heat transfer coefficient. and the relation of average heat transfer coefficient to the local coefficient sh Jar 03 dx=jx. dx 0 0.7 0.7x Distance from leading edge Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 8 Example Given • Experimental results for measured local heat transfer coefficient h for flow over a flat plate with a rough surface • where: a = coefficient x = distance from leading edge – Find expression for average heat transfer coefficient, and the relation of average heat transfer coefficient to the local coefficient ( ) −0.3 h x = ax x 0.7 0 0.3 0 0.3 0.7 1 1 x x a h x dx x a a x dx x h x x x x = =  =  − −