Consider two infinitely long thin concentric tubes of circular cross section as shown in figure. If D, and D, are the diameters of the inner and outer tubes respectively, then the view factor F, is given by 22

Consider two infinitely long thin concentric tubes of circular cross section as shown in figure. If D, and D, are the diameters of the inner and outer tubes respectively, then the view factor F, is given by 22

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.23P

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Question

Which one is correct plzz answer fast

Consider two infinitely long thin concentric tubes of
circular cross section as shown in figure. If D, and
D, are the diameters of the inner and outer tubes
respectively, then the view factor F, is given by
22
D2
(a)
D
(b) Zero
(c)
(d) 1-
Da

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