Question

A flat plate measuring 20 cm by 20 cmis exposed to the flow of 30 degree C water at a velocity of 35 cm/s. If the plate is maintained at a uniform temperature of 95 degree C, what is the total convective heat transfer from the plate?

Answer #1

a) A vertical plate of 700 mm wide
and 120 cm height is maintained at a temperature of 95oC
in a room at 25oC with an air conditioning with velocity
of 36000 cm/min. Calculate the heat transfer coefficient and
convective heat transfer rate.
(b) Two concentric cylinders are
located in a large room. Determine the view factors for the two
cylinders when the length is 20 cm, the inner radius
(r1) is 5 cm and the outer radius (r2) 10...

Problem 4: Air at 20°C and 1 atm flows over a horizontal flat
plate at 1 m/s. The plate is 20m by 1m and is maintained at 60°C.
If the flow is in the direction of smaller side, calculate the
power needed to maintain the surface temperature.
Also repeat problem 4 for a case where air velocity is zero.

A flat wall is exposed to an environmental temperature of 38
degrees C. The wall is covered with a layer of insulation 2.5 cm
thick whose thermal conductivity is 1.8 W/(m.K), and the
temperature of the wall on the inside of the insulation is 320
degrees C. The wall loses heat to the environment by convection.
Compute the value of the convection heat transfer coefficient that
must be maintained on the outer surface of the insulation to ensure
that the...

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...

Carbon dioxide at 90 C and atmospheric pressure flows over a
square horizontal plate at 60 m/s. The side lengths are 60 cm, and
the plate is maintained at a constant uniform temperature of 10 C.
(a) What is the total heat transfer? (b) What is the boundary layer
thickness at the center of the plate?

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.

Found the boundary layer flow on the flow through the flat plate
in the water tunnel. The length of the plate is, L = 30 cm and
width b = 1 m. Meanwhile freestream speed is, U = 2 m / s with the
speed profile is parabolic and. Draw, and the x / L, by formulating
it !
Please answer this question

A plate of length 30 mm in the direction of the flow, a
width of 45 mm and thickness of 1mm, has a surface temperature of
78oC is placed in a stream of air at a temperature of
30oC and velocity of 3.5m/s . Calculate:
The heat loss from the top and bottom of the
plate
The heat loss from a cylinder 5cm long and has the same
volume as the plate and placed across the flow.
for air: ν=...

Liquid water flows in a long pipe of internal diameter of
D = 0.01 m at a mean velocity of V = 0.065 m/s.
The pipe is maintained at a constant and uniform surface
temperature. Assume the flow is both hydrodynamically and thermally
fully developed. For simplicity, evaluate the properties of water
at 300 K.
Calculate the convective heat transfer coefficient of the flow
inside the pipe in W/m2K?

A 0.100 m horizontal square plate has a constant surface heat
flux. The back side is insulated, so all of the heat is dissipated
from the side exposed to the flow of water over one side. Water at
a free stream temperature of 10.0° C. and a free stream velocity of
3.00 m/s flows over one side of the plate. Find the heat flux
possible if the plate temperature cannot exceed 80.0 ° C at any
point.

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