Similarity Solution(cont.) Average Boundary Layer Parameters: C.=1.328 Re2 瓦=h,dx Nux =0.664 Rel2 Pr/3 The effect of variable properties may be considered by evaluating all properties at the film temperature. T= s+To 2Similarity Solution (cont.) • Average Boundary Layer Parameters: , 0 1 x s x sdx x τ ≡ ∫ τ 1/2 , 1.328 Re x f x C − = 0 1 x x x h x = ∫ h dx 1/2 1/3 x 0.664 Re Pr Nu = x • The effect of variable properties may be considered by evaluating all properties at the film temperature. 2 s f T T T + ∞ =