Question:-
In the case of turbulent flow through a horizontal isothermal cylinder of diameter ‘D’ free convection heat transfer coefficient from the cylinder will
Option (A)
Be independent of diameter
Option (B)
Vary as D3/4
Option(C)
Very as D1/4
Option(D)
Very as D1/2
Correct Option:
(A)
Question Solution:
Nu = fn(Gr.Pr)1/4 Gr = (gbΔTD3/92)
(hd/k) = D3/4 h a (1/D1/4)
question-answer-faq-3070