In flow over a surface, velocity and temperature profiles are of the forms u(y) = Ay + By? + Cy3 and T(y) = D+ Ey + Fy2- Gy3 where the coefficients A through G are constants. Obtain expressions for the friction coefficient C, and the convection coefficient h in terms of uco, To, and appropriate profile coefficients and fluid pronerties

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Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.32P
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Q2)
In flow over a surface, velocity and temperature profiles are of the forms
u(y) = Ay + By² + Cy3
and
T(y) = D+ Ey + Fy? - Gy3
where the coefficients A through G are constants. Obtain expressions for the friction
coefficient C, and the convection coefficient h in terms of uo, To, and appropriate profile
coefficients and fluid properties.
Q3)
Water at a temperature of T = 25°C flows over one of the surfaces of a steel wall
(AISI 1010) whose temperature is Ts1 = 40°C. The wall is 0.35 m thick, and its other surface
temperature is Ts,2
= 100°C. For steady state conditions what is the convection coefficient
associated with the water flow? What is the temperature gradient in the wall and in the water
that is in contact with the wall? Sketch the temperature distribution in the wall and in the
adjoining water.
Transcribed Image Text:Q2) In flow over a surface, velocity and temperature profiles are of the forms u(y) = Ay + By² + Cy3 and T(y) = D+ Ey + Fy? - Gy3 where the coefficients A through G are constants. Obtain expressions for the friction coefficient C, and the convection coefficient h in terms of uo, To, and appropriate profile coefficients and fluid properties. Q3) Water at a temperature of T = 25°C flows over one of the surfaces of a steel wall (AISI 1010) whose temperature is Ts1 = 40°C. The wall is 0.35 m thick, and its other surface temperature is Ts,2 = 100°C. For steady state conditions what is the convection coefficient associated with the water flow? What is the temperature gradient in the wall and in the water that is in contact with the wall? Sketch the temperature distribution in the wall and in the adjoining water.
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