-5- For flow over a flat plate, the temperature distribution inside the boundary layer is given by:T-TT,-TIfk 0.03 W/m.K, determine the value of convective heat transfer coefficient.Answer: (h-6.28 W/m' K):0.015

-5- For flow over a flat plate, the temperature distribution inside the boundary layer is given by: T,-T sin T,-T 0.015 Ifk 0.03 W/m.K, determine the value of convective heat transfer coefficient.Answer: (h-6.28 W/m K):

-5- For flow over a flat plate, the temperature distribution inside the boundary layer is given by: T,-T sin T,-T 0.015 Ifk 0.03 W/m.K, determine the value of convective heat transfer coefficient.Answer: (h-6.28 W/m K):

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

See similar textbooks

Similar questions

Water at 50°C flows through an automobile radiator tube 0.5 cm inner diameter, 50 cm long with a mean velocity of 1 m/s. The surface of the radiator tube is at 30°C. Determine the heat transfer coefficient using Colburn Analogy. [Use friction factor f=0.316 Re/5 for turbulent and f=0.184 Re4 for laminar.] The property values of Water at 50°C and 40°C are 50°C 40°C Density (kg/m³) 990 995 Cp (kJ/kg K) 4.182 4.179 k (W/m K) 0.640 0.628 V (m/s) 5.67 x 10"| 6.57 × 10" Pr 3.68 4.34
For fluids with small Prandt number the thermal boundary layer development is much ....................than that of the velocity boundary layer (δt ≫ δ), and it is reasonable to assume ....................... velocity (u = u∞) throughout the thermal boundary layer. Please fill the blank
Need answers in 30 minutes
Question 2 Air (Cp= 1.005 kJ/kg.°C) enters a 7-m-long, 7.2-cm-diameter pipe at 63°C at a rate of 0.06 kg/s. The air cooled at an average rate of 320 W/m² surface area of the pipe. The air temperature at exit of the pipe is:
A thick concrete wall having a uniform temperature of 50oC is suddenly subjected to a stream of water so that the surface temperature is suddenly lowered to 15oC. How long will it take to cool the concrete to 30oC at a depth of 5 cm from the surface? Data: concrete properties, k = 1.37 W/m×oC, r = 2100 kg/m3, a = 7.5×10-7 m2/s.
A 7 cm diameter bed on a 25 cm long bed, as shown in the figure below. The shaft rotates at 3200 revolutions per minute with uniform intervals of 0.2 mm. Continuous operation The temperatures of the shaft and bearing adjacent to the oil gap are 55 0C. your oil viscosity 0.05 N.s/m2 and its thermal conductivity is 0.17 W/m.K. Continuity, momentum and by simplifying the energy equations and solving for each separately, a) The maximum temperature of the oil, b) Calculate the heat transfer rates to the bearing and shaft.
er its eq =3 m2 Of nic Q2\ A long 8-cm-diameter steam pipe whose external surface temperature is 90°C passes through some open area that is not protected against the winds. Determine the rate of heat loss from the pipe per unit of its length when the air is at 1 atm pressure and 7°C and the wind is blowing across the pipe at a velocity of 50 km/h. emp. C Properties of air at 1 atm pressure 20 25 30 35 40 Cross-section of the cylinder Circle 45 50 60 70 Density p. kg/m³ 1.204 1.184 1.164 1.145 1.127 1.109 1.092 D 1.059 1.028 Fluid 1007 1007 1007 1007 1007 1007 1007 1007 1007 Gas or liquid Specific Ival GJ/kg K Air V_-50 km/h 7₂-PC Thermal Conductivity k, W/m K 0.02514 0.02551 0.02588 0.02625 0.02662 0.4-4 4-40 40-4000 4000-40,000 40,000 400,000 Range of Re 0.02699 0.02735 0.02808 0.02881 Thermal Diflusivity a, mis 2.074 x 10-5 2.141 x 10- 2.208 x 10-5 2.277 x 10-5 2.346 x 10-5 2.416 x 10- 2.487 x 10-5 10-5 2.780 x 10-5 2.632 x Pipe D-8cm T₁-90°C Nusselt number Nu== 0.989Re0.330 Pr1/3 Nu…
question is image only part a
A horizontal thin plate with a length of L= 10 cm is tiled with a constant heat flux from the bottom and is cooled by air at the top. The air velocity is U = 40 m / s and the temperature is 20 ° C. What should be the minimum heat flux so that the plate temperature does not exceed 80°C? (kW / m²) v 17.94 x 10-6 m²/s = 0.0277 W/(m.K) Pr = 0.71
A gas flows over a heated horizontal surface with a surface temperature that is uniform and higher in value than the temperature of the gas. The local convective coefficient in W/m².K of this flow with convective heat transfer can be given as a function of the distance x (in meters) from the beginning of the horizontal surface by: h = A xD + B x + C, where A = -2.4, B = 14.8, C = 9.3 and D = 2.7. Based on this information, calculate the average Nusselt number of the flow over the plate if it is three meters long. Consider: ρgas = 0.9950 kg/m³; kgas = 30 x 10-3 W/m.K. Note: Use the equations given in the book by Schmidt et al. for problem resolution.
Fluid with a density of 602 kg/m³ flows inside a 3.3 cm diameter tube at a velocity of 1.7 m/s. The fluid enters the tube at 85°C and exits at 33°C. At the average bulk temperature, the thermal conductivity is 0.50 W/m K, the absolute viscosity is 6.26 x 104 kg/m s and the Prandtl number is 6.65. Using the Dittus-Boelter correlation Nu-0.023Re0.8p where n = 0.4 for heating: n = 0.3 for cooling What is the convection heat transfer coefficient? Express your answer in W/m² K?
2. Consider airflow over a plate surface maintained at a temperature of 215°C. The temperature profile of the airflow is given as T(y) = Too (Too - T,) exp (- V fluid The airflow at 1 atm has a free stream velocity and temperature of 5 cm/s and 25°C, respectively. Determine the heat flux on the plate surface and the convection heat transfer coefficient of the airflow.