What does the logarithmic mean temperature difference represent for flow in a tube whose surface temperature is constant? Why do we use the logarithmic mean temperature instead of the arithmetic mean temperature?

Q: rite the definition ,formula and significance of Reynolds number and Grashoff number in convection…

A: Given: Reynolds number Grashoff number To write: The formula, definition and significance of in…

Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…

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Q: Water (5.0 L/min) is flowing in a tube "D = 3 cm, L= 5 m" and is to be heated from 15°C to 64.0°C by…

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Q: HW Pressure Drop in a Pipe Water at 60°C is flowing by pump in a 0.0015-m-diameter 0.5-m-long pipe…

A: Given: T= 60o C Pipe diameter, d=0.0015 m length of the pipe, L=0.5 m average velocity, v=0.5 m/s…

Q: An ASTM B75 copper tube sheathes a heating element that is used to boil water at 1254 kPa. The…

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Q: Engine oil flows at a rate of 0.05 kg/s through a section of a 2.5 cm diameter tube. The oil enters…

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Q: Air at 1 atm and 20 C flows in a 2.5-cm-diameter tube. The maximum velocity (m/s) of air to keep the…

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Q: A tube with a square cross-section 2 mm in side and 1.5 m in length imposes a constant heat flux of…

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Q: Consider a 50-mm-diameter and 25-m-long smooth tube that is maintained at a constant surface…

A: Write the expression of the average temperature.Here  indicates inlet temperature and  indicates…

Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…

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Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…

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Q: Consider the case of liquid flow in a uniformly heated channel. Initially, heat flux is so low that…

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Q: Air at 206.8 kPa and at an average temperature of 200 oC is being heated as is flows through a tube…

A: Given data  Pressure = 206.8 kpa Average temperature= 200°C Inside diameter of pipe = 40mm Velocity…

Q: For flow over a flat plate, indicate the letter that describes the local variation of the heat…

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Q: In combustion engines oil is used for lubrication. The oil enters the oil cooler while its…

A: Properties are calculated at film temperature 40 deg C. Reynolds number is found (laminar) Average…

Q: Air at 1 atmosphere and a temperature of 60f enters 1/2-in. id tube with a velocity of 80 fps. The…

A: Given information Pressure of air entering = 1 atmTemperature = 60°F = 288.7056 KDiameter of tube =…

Q: Engine oil flows at a rate of 0.05 kg/s through a section of a 2.5 cm diameter tube. The oil enters…

A: Given: Mass flow rate of the engine oil→m=0.05 Kg/s Diameter of the tube→D=2.5 Cm=0.025 m Initial…

Q: An coconut oil (considered as viscous fluid) must be pumped between two buildings in an…

A: Given data: The oil flow rate is m = 20 kg/s. The liquid will be heated to temperature of To = 40…

Q: What is the function of V-cone flow element and manifold pressure measuring devices, where equipment…

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Q: Consider a 50-mm-diameter and 25-m-long smooth tube that is maintained at a constant surface…

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Q: Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular…

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Q: Water with a mass flow rate of 0.002 kg/s at 18oC flows inside a tube while the flow is already…

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Q: Industrial pipes Are stainless steel pipes more demanding about the flexibility design…

A: The objective of the question is to understand if the design flexibility of stainless steel pipes is…

Q: 8.62, 8-62 Consider a 10-m-long smooth rectangular tube, with a = 50 mm and b = 25 mm, that is…

A: Write the given information.Write the expression of the mean temperature.Write the properties of…

Q: A fluid is flowing through two different tubes of same cross-section area. We are to compare the…

A: Given: The length of the circular pipe and square pipe is same. Heat transfer is calculated as:…

Q: Q) Water at 12°C flows in a 2.5-cm-diameter pipe and 10-m-long at an average velocity of 0.1 m/s.…

A: Given: The temperature of water, T = 12°C The diameter of pipe, d = 40 cm = 0.025 m The length of…

Q: ) For a problem as in Exercise (7), determine the heat losses to the surroundings. However, you know…

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Q: Water (cp=4.182 kJ/kg.K, k=0.6405 W/m.K, Pr=3.57, ν=0.5537x10-6 m2/s, ρ=998 kg/m3) flows through a…

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Q: The Reynolds number can be viewed as the ratio of (a) Drag force/Dynamic force (b) Buoyancy…

A: Reynolds number: The Reynolds number is used to describe the flow of fluid inside the tube or over…

Q: Water (5.2 L'min) is flowing in a tube "D-3 cm, L-5 m" and is to be heated from 15°C to 59.9°C by…

A: Given:Volume Flow rate,Q=5.2Lmin=5.2×10-360m3secDiameter,D=3cm=0.03mLength of tube,L=5mInitial…

Q: A steam power plant is located in the northern part of the country. Steam in the plant flows…

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Q: Heat Transfer Lesson The temperature will be increased from 10 (Degree Celsius oC) to 90 (Degree…

A: In problem  inlet temperature of water= 10°C  outlet temperature of water= 90C° diameter of pipe is…

Q: Air is to be heated from 15 C to 270 C, as it flows through a tube 25mm diameter at average velocity…

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Q: How is the Reynolds number related to Darcy-Weisbach?

A: Reynolds number is used to determine the nature of the fluid, Laminar or turbulent fluid.

Q: What regime favors heat transfer and why? Laminar, Turbulent or Transitional

A: Heat transfer is basically a process in which the molecules are moved from their initial position in…

Q: Find the heat transfer rate of water that enters a tube with a flow rate of 0.015 kg/s and an inlet…

A: Given data: Mass flow rate = m = 0.015 kg/s Inlet temperature = T∞   = 20°C Length of tube = L = 6 m…

Q: A scientist suggests the following correlation be used for square tubes in a liquid cross- flow…

A: Nu=h*lc/K From the above equation, Nu=0.102*Re^0.675 *Pr^1/3 h*lc/K=0.102*10000^0.675 *(6^1/3)…

Q: 9-94 A hot liquid (c, = 950 J/kg-K) flows at a flow rate PtD of 0.005 kg/s inside a tube with a…

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Q: Air at 15 m/s is cooled from 80 C to 60 C in 2.5cm diameter tube. The tube wall is maintained at a…

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Q: Water is to be heated from 35 °C to 65 °C in a rough tube with a relative roughness of 0.001. The…

A: Given: The initial temperature of the water, Ti= 35o C The Outlet temperature of the water, To= 65o…