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(a)- What is the Reynolds number? (b)- What is the heat rate transfer to the air from the tube, in W? (c)- What is the required heat flux at the exit, in W/m2 ?

(a)- What is the Reynolds number? (b)- What is the heat rate transfer to the air from the tube, in W? (c)- What is the required heat flux at the exit, in W/m2 ?

Elements Of Electromagnetics
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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Air at a temperature Tmi = 20°C andp = 1 atm enters a 25-mm diameter, 1.5 m tube with a mass flow rate of 6 x 10-4 kg/s. A constant heat flux warms the air so that its exit mean temperature is Tmo= 50°C. Assume fully developed flow. m,0 kg µ = 188.4 × 10-7 Ns, Pr = 0.706, k = 0.02689 W = 1007,, e = 1.16- m2 > mK» Cp= (a)- What is the Reynolds number? (b)- What is the heat rate transfer to the air from the tube, in W? (c)- What is the required heat flux at the exit, in W/m2 ? (d)- What is the surface temperature of the wall at the exit (T5.o), in °C? D=25 mm Tmi = 20°C h = 6x 10kg/s L=1.5 m Te =?
Transcribed Image Text:Air at a temperature Tmi = 20°C andp = 1 atm enters a 25-mm diameter, 1.5 m tube with a mass flow rate of 6 x 10-4 kg/s. A constant heat flux warms the air so that its exit mean temperature is Tmo= 50°C. Assume fully developed flow. m,0 kg µ = 188.4 × 10-7 Ns, Pr = 0.706, k = 0.02689 W = 1007,, e = 1.16- m2 > mK» Cp= (a)- What is the Reynolds number? (b)- What is the heat rate transfer to the air from the tube, in W? (c)- What is the required heat flux at the exit, in W/m2 ? (d)- What is the surface temperature of the wall at the exit (T5.o), in °C? D=25 mm Tmi = 20°C h = 6x 10kg/s L=1.5 m Te =?
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