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In a manufacturing process, long rods of different diameters are at a uniform temperature of 400°C in a curing oven, from which they are removed and cooled
In a manufacturing process, a long coated plastic rod (p = 2200 kg/m J · c = 800 J/kg · K, k =1 W/m · K) of diameter D = 20 mm is initially at a uniform
Hydrogen at 15°C and at a pressure of 1 atm is flowing along a flat plate at a velocity of 3 m/s.
How would you treat a radiation heat transfer boundary condition for a one-dimensional steady problem? Develop the difference equation for a control volume
Hot flue gases from a combustion furnace flow though a chimney, which is 7 m tall and has a hollow cylindrical cross section with inner diameter
Hot coffee is contained in a cylindrical thermos bottle that is of length L = 0.3 m and is lying on its side (horizontally)
Heat transfer by radiation occurs between two large parallel plates, which are maintained at temperatures T1 and T2, with T1 > T2
Heat is transferred through a plane wall from the inside of a room at 22°C to the outside air at -2°C.
Heat is uniformly generated at the rate of 2 x 105 W/m 3 in a wall of thermal conductivity 25 W/m · K and thickness 60 mm
Highly reflective aluminum coatings may be formed on the surface of a substrate by impacting the surface with molten drops of aluminum
Hot exhaust gases are used in a shell-and-tube exchanger to heat 2.5 kg/s of water from 35 to 85°C. The gases assumed to have the properties of air
Hot air for a large-scale drying operation is to be produced by routing the air over a tube bank (unmixed), while products of combustion are routed
Hot air flows from a furnace through a 0.15-m-diameter, thin-walled steel duct with a velocity of 3 m/s. The duct passes through the crawlspace of a house
Heat transfer is not an intuitive process muses the Curious Cook. Does doubling the thickness of a hamburger approximately double the cooking time?
Hot water at 85°C flows through a thin-walled copper tube of 30 mm diameter. The tube is enclosed by an eccentric cylindrical shell that is maintained at 35°C
Hot water for an industrial washing operation is produced by recovering heat from the flue gases of a furnace.
Forced air at T8 = 25°C and V = 10 m/s is used to cool electronic elements on a circuit board. One such element is a chip, 4 mm by 4 mm. located 120 mm
For the geometry shown in the sketch below, determine the layout of nodes and control volumes. Provide a scale drawing showing the problem geometry
For laminar free convection from a heated vertical surface, the local convection coefficient may be expressed as hx = Cx-1/4, where h, is the coefficient
For laminar flow over a flat plate, the local heat transfer coefficient h. is known to vary as x-1/2, where x is the distance from the leading edge (x = 0)
Fully developed conditions are known to exist for water flowing through a 25-mm-diameter tube at 0.01 kg/s and 27°C. What is the maximum velocity
Exhaust gases from a wire processing oven are discharged into a tall stack, and the gas and stack surface temperatures at the outlet of the stack
Experiments have been conducted to determine local heat transfer coefficients for flow perpendicular to a long, isothermal bar of rectangular cross section
Experimental measurements of the convection heat transfer coefficient for a square bar in cross flow yielded the following values:
What are the modes when the temperature on one surface of the steel plate is not specified, but the surface is exposed to a fluid at a specified temperature.