A rectangular tube (remember hydraulic diameter) of sides 25mm and 40mm. If air RT passes through the tube at 0.05 m^3/s, what is the convection coefficient inside the tube? The inside of the tube is held at 200 celsius. Note- RT is 25 celsius
A rectangular tube (remember hydraulic diameter) of sides 25mm and 40mm. If air RT passes through the tube at 0.05 m^3/s, what is the convection coefficient inside the tube? The inside of the tube is held at 200 celsius. Note- RT is 25 celsius
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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A rectangular tube (remember hydraulic diameter) of sides 25mm and 40mm. If air RT passes through the tube at 0.05 m^3/s, what is the convection coefficient inside the tube? The inside of the tube is held at 200 celsius.
Note- RT is 25 celsius
Transcribed Image Text:Boundary Condition
Laminar or Turbulent
Nusselt Equation
Uniform Temperature
Laminar
Nu = 0.664Ref5p
Nu = 0.037Ref"p
Nu = 0.453R€25P;/3
Uniform Temperature
Turbulent
Uniform Heat Flux
Laminar
Uniform Heat Flux
Turbulent
Nu = 0.038 Rep/3
Reynold's Number Ranges:
Re <1x 105 - Laminar
Re 23 x 106 - Turbulent
selt Correlations for Forced Convection over circular and non-circular cylinders in cross-flow.
Shape
Fluid
Range of Re
Nusselt Number
Cylinder
Gas or Liquid
0.4-4
Nu = 0.989 Re"p
4-40
Nu = 0.911 Resp7
40-4,000
Nu = 0.9683 Re 46p
4,000 - 40,000
Nu = 0.193 Re4p
40,000 - 400,000
Nu = 0.027Rees pT
Transcribed Image Text:Density
kg
Material
Specific
Latent Heat Latent Heat
Thermal
of Fusion,
of
Conductivity
Heat
kgKA
Vaporization
W
\mK.
kg.
Air
1.225
718
0.025
Aluminum
2712
900
396000
200
Ammonia
682
4400
1371000
(Liquid)
Cast Iron
7300
460
247000
40
Copper
8940
390
206000
400
Ероху
1200
1000
1.5
G10
1800
670
0.3
Fiberglass
Glass
2200
750
1
Silicone
1070
1300
0.2
Steel
7850
450
247000
20
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