Example Given Experimental results for measured local heat transfer coefficient h for flow over a flat plate with a rough surface 0.3 where:a=coefficienth(x)=ax x=distance from leading edge Find expression for average heat transfer coefficient,and the relation of average heat transfer coefficient to the local coefficient 万x= I jax03ds=ajx3d X0 hx 1ax07 0.7x 2.5 1.5 050 2 Distance from leading edge Heat Transfer Su Yongkang School of Mechanical Engineering# 10 Heat Transfer Su Yongkang School of Mechanical Engineering 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 = = ∫ = ∫ − −