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Consider a flat plate subject to parallel flow (top and bottom) characterized by U8 = 5 m/s, T8 = 20°C.
Consider a liquid metal (Pr < 1)="" with="" free="" stream="" conditions="" u8="" and="" t8,="" in="" parallel="" flow="" over="" an="" isothermal
Consider a large vertical plate with a uniform surface temperature of 130°C suspended in quiescent air at 25°C and atmospheric pressure.
Consider a horizontal pin fin of 6-mm diameter and 60-mm length fabricated from plain carbon steel (k = 57 W/m · K, 8 = 0.5)
Consider a horizontal 6-mm-thick, 100-mm-Iong straight fin fabricated from plain carbon steel (k = 57 W/m · K, e = 0.5).
Consider a rectangular fin that is used to cool a motorcycle engine. The fin is 0.15 m long and at a temperature of 250°C
Consider a one-dimensional fin of uniform cross-sectional area, insulated at its tip, x = L. The temperature at the base of the fin Tb and of the adjoining
Consider a long bar of square cross section (0.8 m to the side) and of thermal conductivity 2 W/m · K
Certain wood stove designs rely exclusively on heat transfer by radiation and natural convection to the surroundings
Coatings applied to long metallic strips are cured by installing the strips along the walls of a long oven of square cross section
Consider a batch process in which 200 liters of a pharmaceutical are heated from 25°C to 70°C by saturated steam condensing at 2.455 bars
Consider a band-saw blade being used to cut steel bar stock. The blade thickness is 2 mm, its height is 20 mm, and it has penetrated the steel workpiece
Consider a concentric tube annulus for which the inner and outer diameters are 25 and 50 mm. Water enters the annular region at 0.04 kg/s and 25°C
Consider a concentric tube heat exchanger with hot and cold water inlet temperatures of 200 and 35°C, respectively. The flow rates of the hot and cold fluids
Compare the rate of heat flow from the bottom to the top in the aluminum structure shown in the sketch with the rate of heat flow through a solid slab.
If the fluid around the sphere is quiescent and extensive, show that the conduction limit of heat transfer from the sphere can be expressed as NuD, cond = 2.
Circular copper rod of diameter D = 1 mm and length L = 25 mm are used to enhance heat transfer from a surface that is maintained at Ts.1 = 100°C
Beverage in cans 150 mm long and 60 mm in diameter is initially at 27°C and is to be cooled by placement in a refrigerator compartment at 4°e.
Ball bearings are to be hardened by quenching them in a water bath at a temperature of 37°C. Suppose you are asked to devise a continuous process
At the equator, where the sun at noon is approximately overhead, a near optimum orientation for a flat plate solar hot water heater is in the horizontal
Batch processes are often used in chemical and pharmaceutical operations to achieve a desired chemical composition for the final product
Assuming a transition Reynolds number of 5 x 105, determine the distance from the leading edge of a flat plate at which transition will occur for each
Atmospheric air enters a100-m-long, 150-mm-diameter uninsulated heating duct at 60°C and 0.04 kg/s. The duct surface temperature is approximately constant
An object of irregular shape has a characteristic length of L = 1 m and is maintained at a uniform surface temperature of Ts = 325 K.
An uninsulated, thin-walled pipe of 100-mm diameter is used to transport water to equipment that operates outdoors and uses the water as a coolant.