A) What is the physical interpretation of the Grashof number? B) When the effect of forced wwwwwwwwon convection will be negligible compared to free convection? %20
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- A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The satellite generates 1000 W of internal power from a small nuclear generator. If the surface of the satellite has an emittance of 0.3, and is shaded from solar radiation by the earth, estimate its surface temperature.please explain brefly in type form Describe the physical mechanism of convection. How is the convection heat-transfer coefficient related to this mechanism?Differentiate between free and forced convection with examples.
- Experiment No. (5) Heat Transfer, Power Input and Surface temperature Questions and Discussions 1. What is the difference between natural and forced convection heat transfer? 2. What sources of error are there in this experiment? 3. Mention the parameters you utilized during the calculation and discuss them briefly. 4. In what functions does Nusselt number in natural convection differ from forced convection, Discuss. 5. Give two examples of natural convection heat transfer. 6. In natural convetion, what makes the hot part of fluid to move?Experiment No. (5) Heat Transfer, Power Input and Surface temperature 4. In what functions does Nusselt number in natural convection differ from forced convection, Discuss.A 10 cm * 10 cm plate has a constant surface temperature of 150°C. Determine the Grashof number if the chip is placed in the following fluids: air (1 atm, 30°C), liquid water (30°C), and engine oil (10°C). Discuss how the Grashof number affects the natural convection flow.
- Either free or forced convection is good by considering an example. please explaina) What regions show the largest oceanic latent heat loss? b) What regions show the saltiest surface waters? c) What is the main factor affecting the two radiation heat flux terms? Name the two fluxes. d) What is the main factor affecting the two turbulent heat flux terms? Name the two fluxes.Define convection and its types. Either free or forced convection is good by considering an example.
- The surface temperature of a 10 m long and a 6-cm-diameter horizontal hot water pipe is 73 ℃. Assume the air temperature to be 27 ℃. Determine the rate of heat loss from the pipe by free convection. Properties of Air are: k = 0.02735 W/m.℃, ν = 1.798*10^-5 m2/s, Pr = 0.7228, β= 1/Tf = 0.003096 K^-1.For the Convective Heat Transfer experiment, describe the difference in the procedures: Natural or FreeConvection and Forced convection. What makes the FORCED convection experiment as FORCED? Explain which, in your consideration should give the higher heat transfer rate? And REASON why? Did your results support your consideration?A house located in the south of the country was built using windowsdoubles to reduce heat loss to the outside environment on very cold days. Consider that the house has 6 windows 80 cm high and 1.2 m wide, each consisting of 2 layers of glass (kv=1.4 W/(m.oC) 4 mm thick, separated from each other for a spacing of 10 mm filled with stagnant air (ka=0.024 W/(mK), we disregard natural convection effects) On a day when the interior of the house is kept at 22oC, with h=10 W/(m2. K) while the external environment is at 5oC with h=50 W/(m2.K), it is requested:(a) What is the rate of heat dissipation through the windows?(b) What are the temperatures on the glass surfaces inside and in theexterior of the house?(c) Which of the resistances is the limiting in the dissipation process ofheat?(d) Estimate the increase in dissipation rate if we consider that the natural air convection in the space between the windows is characterizedby a convective coefficient h=5 W/(m.K).(e) How the value obtained…