Answered: Air at 200C and at a pressure of 1 bar…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Air at 200C and at a pressure of 1 bar is flowing over a flat plate at a velocity of 3 m/s. If the plate is 280 mm wide and at 560C, calculate the following quantities at x = 280 mm given that properties of air at the bulk mean temperature 20 + 56/2= 380C are:

(i) Boundary layer thickness,
(ii) Local friction coefficient,
(iii) Average friction coefficient,
(iv) Shearing stress due to friction
(v) Thickness of the boundary layer,
(vi) Local convective heat transfer coefficient,
(vii) Average convective heat transfer coefficient,
(viii) Rate of heat transfer by convection
(ix) Total drag force on the plate, and
(x) Total mass flow rate through the boundary

p = 1.374 kg/m³; k = 0.02732 W/m°C; cp
1.005 kj/kgK; v = 16.786 × 10° m²/s; Pr = 0.7.

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