07: Convection heat transfer Calculate h and Nu for each reading Power (e a): 23 W, Plate area: 106mmx106mm
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A: The radiant thermal flux per square metre from a brick wall at this temperature: 526.75 W/m2
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Q: Air at 20◦C blows over a hot plate 50 by 75 cm maintained at 250◦C. The convection heat-transfer…
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Q: A black plate (e = 1) of dimensions 1 m x 1 m x 0.025 m is maintained at its top a temperature of…
A: The answer is given below
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A: NOTE:- Here, we have to use correlation for find out the convection heat transfer rate.So, answer…
Q: Without writing any equations, give a verbal description ofboundary layer displacement thickness.
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Q: A Deep-sea Diver is wearing a wetsuit in cold water. (Natural convection, radiative transfer is…
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Q: U.=20m/s T=24°C Rectangular plate has an unheated starting length of 20 mm. If the surface…
A: Given, Velocity of the flow U∞=20m/s Temperature of the incoming air T∞ = 24°C Unheated length of…
Q: A long, 20-cm diameter pipe is carrying hot water. The temperature of the air around the pipe is…
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Q: 1. The dimensionless A. Prandtl number number not used in forced convection is: B. Reynolds number…
A: Note: Since you have asked multiple question, we will solve the first question for you. If you want…
Q: To good approximation, the thermal conductivity k of a gasdepends only on the density ρ ,mean free…
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Q: A carbon steel plate (thermal conductivity = 45 W/m°C) 600 mm x 900 mm x 25 mm is maintained at…
A: Heat Transfer: The transfer of heat from one body to another body due to the difference in…
Q: If forced convection uses Reynolds number to account for fluid movement during forced convection,…
A: Convection heat transfer: The heat transfer due to the motion of the fluid (air) is known as…
Q: Two vertical plates, each 200 mm high and at 90°C are placed in a tank of water at 30 °C. Calculate…
A: According to the information we have two vertical plates are placed in a tank of water at 30 °C. for…
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Q: U=20m/s T=24°C Rectangular plate has an unheated starting length of 20 mm. If the surface…
A: Given : U∞=20 m/sT∞=24°CLunheated=20 mmL=30 mm
Q: A) Among the nondimensional numbers, in free convection, average Nusselt number depends on only…
A: (A) Free convection, in free convection the heat transfer takes place due to density difference. now…
Q: One of the non-dimensional number is important to determine whether forced convection is important…
A: If Grashof number (Gr.) is, Gr. > 109 Forced convocation dominant. Gr. < 109 Natural…
Q: Q1/ An aluminum rod 4.0 cm in diameter and 10 cm long protrudes from a wall that is maintained at…
A: Given data d =0.04 mL=0.1 mε=0.7Tb=250°CT∞=40°C
Q: 3. Compute for the Nusselt value of a natural convection in a small holding tank with a heating…
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Q: What is the rate of heat loss through a 4-cm Fiberglass wall of the inside temperature is 22 °C and…
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Q: A circular plate of diameter (1.36 m) is placed some how 1.5 meter above the room floor, if the…
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Q: A large vertical plate 6.1 m high and 1.22 m wide is maintained at a constant temperature of 57+C…
A: Determine the mean film temperature
Q: Air at 20-C blows over a hot plate 50 by 75 cm maintained at 250-C. The convection heat- transfer…
A: T0=20°CA= 50×75 cm2A=.375 m2Tw=250 °Ch=25 Wm2°C Heat transfer rate Q=hAs∆T
Q: 1). Compare the heat loss between a standard double pane window 0.9 m by 0.47 m hat has a gap filled…
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Q: 9) If the temperature of the sun were to suddenly double, by what multiplicative factor would the…
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Q: 4. For a flat plate, the transition from the free convection boundary layer to the free convection…
A: Rayleigh number, Ra, is a dimensionless term utilized in the computation of normal convection. where…
Q: A fluid with a surface film coefficient of 500 W / ° C flows through a pipe (k = 40 W / m ° C) with…
A: The diagram of the pipe is given as, The heat flow rate from the fluid is written as, The heat…
Q: Explain why an absolute temperature is defined and give its SI units.
A: Given Data : Absolute temperature SI Unit
Q: Oxygen gas at a temperature of 27°C at atmospheric pressure flows in parallel at 20 m/s over a…
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Q: Using the equations for the Barometric Law and temperature decrease from adiabatic expansion (found…
A: Given Data h=5km T=288K γ=1.4 Using the Barometric Law as Follows
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Q: To improve indoor air quality, an Edinburgh pub has installed a vertical glass screen to cover the…
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Q: QI/ An aluminum rod 4.0 cm in diameter and 10 cm long protrudes from a wall that is maintained at…
A: Given: Diameter of the fin=0.040m Length of the fin=0.1m Tb=250°C T∞=40°C Velocity of the air=50m/s…
Q: A square array of 2 cm diameter pipes consists of 64 pipes, each 80 cm long. The pipe surface…
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Q: B) Why is it that a very thin layer of a soap bubble (less than a wavelength of light) appears dark…
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Q: Describe the physical mechanism of convection. How is the convection heat-transfer coefficient…
A: To Describe the physical mechanism of convection. How is the convection heat-transfer coefficient…
Q: A convection problem has a Nusselt number equal to 10. where the contribution of diffusion is…
A: Solution: The correct option with the necessary explanation is given below:
Q: An oil is acting as a lubricant for a pair of cylindrical surfaces. The angular velocity of the…
A: Given data:N=7908 rpmr0 = 5.06 cm =0.0506 mc=0.027cm=0.00027 mT1=wall temps = 70°Cu=92.3 cp =0.0923…
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- As part of an industrial pipe system a 6-meter-long by .5 meter inner diameter copper pipeweighing 200kg holds a lubricating oil in place while is heats from 20 deg C to 55 deg C. At thatpoint, the valve opens and allows to oil to flow through. What is the total heat transferrequired? And, what percentage of the heat transferred does the oil and copper each accountfor? (oil density = .9 kg/L , oil specific heat = 1800 J/kgC)Topic: Heat transfer Completely solve and box the final answer. A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The water flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, What is the local heat flux (Q/A) at the end of the plate (k=0.72 W/m deg C, Re=3840000, and Pr=0.7)?A steam pipe carrying steam at 380 kPa pressure for a distance of 120 m in a chemical plant is not insulated. Estimate the Amount of heat saved if 16 cm steam line were covered with 85% magnesia pipe covering 5 cm thick. Take room temperature to be 36 ℃. Thermal conductivity of 85% magnesia is 0.0745 W/m−K , unit convective coefficient of room air, ho = 12 W m2−K .Take the steam temperature as 142℃. Use atleast 4 decimal places in every computation
- Question - Maddy found the value of heat transfer coefficient 26 W/m^2 °C and faces the difficulties in conversion of si units to english units , so help him in conversion by conversion factors between watt to btu/h and m to ft and °C to °FSelect the letter of the correct statement. Write the answer with calculations, drawing, rules or explanation 2-) A scientist suggests the following correlation be used for square tubes in a liquid cross-flow situation (Nu = 0.102 Re0.675 Ppl/3). Water (k = 0.61 W/m.K, Pr= 6) flows across a 1-cmsquare tube with a Reynolds number of 10,000. The convection heat transfer coefficient is:(A-) 5.7 kW/m?.K(B-) 8.3 kW/m?.K(C- ) 11.2 kW/m?.K(D-) 18.1 kW/m?.K.Heat transfers Water (T= 10 C, , k=0.644 W/m.C, υ = 5.54× 10^-7 m2/s, Pr=3.55), flow over plate 1m x 1m , with velocity 2 m/s. the plate surface temperature is 90 C. Give the answer for the following: Nu number equal to Total heat transfer The flow type The average heat transfer coefficient
- Topic: Heat transfer Completely solve and box the final answer. 1. A 20degC water flows to 50cmx60cm flat plate with velocity of 5.2m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent?Air at 10 m/s is flowing over a cylinder of D=(1) cm and L = 1 m. Air has thermalconductivity 0.027 W/mK, kinematic viscosity 1.9*10-5 m2/s, and Prandtl number 0.72.Find the Nusselt number uses charts/table also if neededWater flows at 5m/s is passed through a tube of 2.5 cm diameter, it is found to be heated from 20degC to 60degC. The heating is achieved by condensing steam on the surface of the tube and subsequently the surface temperature of the tube is maintained at 90degC. Water properties are as follows: density=995kg/m3, kinematic viscosity=.657x10-6 m2/s, Pr=4.43, k=.628W/mK, cp=4178J/kgK. Determine the Reynolds number Round your answer to 2 decimal places. What is the thermal coefficient Round your answer to 2 decimal places. what is the heat absorbed by the water? Round your answer to 2 decimal places.
- Topic: Heat transfer Completely solve and box the final answer. A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent? If the average laminar heat transfer coefficient of water is 7740W/m2 degC, what is the overall heat transfer at the laminar section?Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine is hot. Such a radiator, made of copper, is filled to its 12-L capacity when at 10.0°C. -What volume of radiator fluid, in liters, will overflow when the radiator and fluid reach their 99.5°C operating temperature, given that the fluid’s thermal coefficient of volume expansion is 400.0 × 10-6 / °C? The coefficient of volume expansion for copper is 5.1 × 10-5 /°C.Air at 24°C is blown over a hot pipe with a surface area of 2.94 m2 to dissipate 924 W of heat energy. What is the minimum convection heat transfer coefficient that will ensure that the temperature of the pipe surface is less than 45°C [round your final answer to two decimal places]?