Question:-
When there is flow of fluid over a flat plate of length ‘L’ the average heat transfer coefficient is given by (Nux = local Nusselt number; other symbols have the usual meaning)
Option (A)
L0 hxdx
Option (B)
(d/dx)(hx)
Option(C)
(1/L)L0 hxdx
Option(D)
(K/L)L0 Nuxdx
Correct Option:
(C)
Question Solution:
hav = (1/L) L0 hx. dx.
A = 1 x L; m2
q = hav x A x ΔT = ∫hx. dx. ΔT
hav = (1/L) ∫hx. dx.
question-answer-faq-3068