Convection overview Consider a flat plate oflength L, in air flow with velocity uoo and temperature Too y uoo, Too 1,7 Local heat flux is where h is the q"=H(T-7) local heat transfercoefficient Total heat transfer rate. ∫ql4=(,-T)hll q=hA(T-T average heat transfer coefficient Determination ofh'will rely on analytical as well as empirical data Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 5 Convection overview • Consider a flat plate of length L, in air flow with velocity u and temperature T • Local heat flux is: where h is the local heat transfer coefficient • Total heat transfer rate: h = average heat transfer coefficient Determination of ‘h’ will rely on analytical as well as empirical data ( ) = −  q  h Ts T    =  = − s As s s A q q dAs (T T ) hdA ( ) q = hAs Ts −T