Question
Air at a pressure of 1 atm and a temperature of 15C is in parallel flow...
Air at a pressure of 1 atm and a temperature of 15C is in
parallel flow at a velocity of 10
m/s over a 3-m long flat plate that is heated to a uniform
temperature of 140 C.
(a) What is the average heat transfer coefficient and heat transfer
rate for the plate?
(b) What is the local heat transfer coefficient and heat flux at
the midpoint of the plate?
(c) Plot the variation of the heat flux with distance along the
length of the plate.
Ans: (a) 19.9 W/m2K, (b) 25.4 W/m2K
Do help in detailing the rationale behind each steps
Homework Answers
Answer #1
it
is properties table..
thanks
any doubt feel free to comment..
Thank you very much.
Not the answer you're looking for?
Similar Questions
Air flows over a plate. The temperature of the air is 85 ° C and the...
Air flows over a plate. The temperature of the air is 85
° C and the speed is 3.5 m / s. The length of the plate is 1.7 m
and at a constant temperature of 25 ° C across the surface.
According to this,
a.) Calculate the speed and temperature boundary layer thickness at
the end of the plate.
b.) Find the local heat transfer coefficient and heat flux at the
end of the plate.
c.) Find the average...
A square plate of 0.5 m length is heated to temperature of 383 K. Air at...
A square plate of 0.5 m length is heated to
temperature of 383 K. Air at 293 K and 1 atm flows over the plate
at 15 m/s. Calculate the total heat transferred. Determine the
convection heat transfer coefficient, thermal boundary layer, and
the velocity boundary layer at the trailing edge of the plate.
Liquid water at velocity of 2 m/s and temperature of 15 °C flows over a flat...
Liquid water at velocity of 2 m/s and temperature of
15 °C flows over a flat plate. The plate has a width of 1 m, length
of 0.4 m and surface temperature of 37 °C.
Determine:
(a) the average heat transfer coefficient.
(b) the convection heat transfer rate from the top surfacc of the
platc.
A hot plate with a temperature of 60 ° C will be cooled by adding 50...
A hot plate with a temperature of 60 ° C will be cooled by
adding 50 triangular profile needle blades (k = 243 W / mK) with a
length of 93 mm and 10 mm. According to the ambient temperature 20
C and the heat transfer coefficient on the surface 20 W / m ^ 2 K;
a-) Wing efficiency, b-) Total heat transfer rate (W) from the
wings, c-) Calculate the effectiveness of a wing.
71 mm thick horizontal plate made of an opaque material of thermal conductivity k= 25 W/m-K....
71 mm thick horizontal plate made of an opaque material of
thermal conductivity k= 25 W/m-K. At the bottom, water flows at a
temperature of T∞,w = 25C, whereas air flows at the top of the
plate at T∞,a = 710 C having convection coefficient of ha= 71
W/m2-K. Assuming a diffused top of the plate that receives an
irradiated flux of 7100W/m2, of which 30% is reflected back. The
top and bottom surface temperatures are maintained at 43 C...
What is the heat flux (W/m2) to an object when subjected to convection heat transfer environment...
What is the heat flux (W/m2) to an object when subjected to
convection heat transfer environment given: 24 °C = the surface
temperature of the object, 82 °C = the bulk temperature of the
fluid adjacent to the object, and the convection heat transfer
coefficient = 49 W/(m^2 K)?
Question 1:
a. 3201
b.
2842
c.
1234
d.
2531
A slab of meat 25.4 mm thick originally at a uniform temperature of 10°C is to...
A slab of meat 25.4 mm thick originally at a uniform temperature
of 10°C is to be cooked from both sides until the
center reach 121°C in an oven at
177°C. The convection coefficient can be assumed
constant at 25.6 W/m2.K. Neglect any latent heat changes and
calculate the time required. The thermal conductivity is 0.69
W/m².K and the thermal diffusivity is 5.85x10-4 m²/h.
A spherical tank, 1.5 m in diameter, is maintained at a temperature of 120 ◦C and...
A spherical tank, 1.5 m in diameter, is maintained at a
temperature of 120 ◦C and exposed to a convection environment with
heat transfer coefficient, h=15 W/m2
◦C and T∞ =20 ◦C. For the same surface
temperature of the tank, it is desired to insulate the tank in
order to decrease the heat loss by 45 percent, determine the
thickness of insulation layer (k=0.2 W/m ◦C ) and the outer surface
temperature.
Helium at a free stream temperature of T∞ = 25°C is in parallel flow over a...
Helium at a free stream temperature of T∞ =
25°C is in parallel flow over a flat plate of length L = 3 m and
temperature Ts = 85°C. However, obstacles
placed in the flow intensify mixing with increasing distance x from
the leading edge, and the spatial variation of temperatures
measured in the boundary layer is correlated by an expression of
the form T(°C) = 25 + 60 exp (−600xy), where
x and y are in meters
A boiler made from a polished brass plate, operate at a surface temperature of 135˚C, is...
A boiler made from a polished brass plate, operate at a surface
temperature of 135˚C, is used to boil saturated water at 2.455 bars
(2.04229 atm.):
Estimate the operating heat flux for this boiler.
Calculate the heat transfer coefficient.
Show that the boiling is nucleate.
If the boiler material is changed to polished copper (other
conditions are the same), what will be the required operating flux
for this new boiler?
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 35 minutes ago
asked 53 minutes ago
asked 58 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago