Engineering, 22.03.2021 18:30 dhhdjejdjdbdhdne
Consider the axial laminar flow between two parallel porous plates separated by a distance 2W. There is a transverse velocity yw into the channel through the top plate and out through the bottom plate at the same value. Develop an expression for the axial velocity profile u( y) for fully developed flow
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Engineering, 04.07.2019 19:10
What are the major differences between injection molding and extrusion?
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Engineering, 04.07.2019 19:20
To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.
Answers: 1
Engineering, 06.07.2019 03:10
Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window
Answers: 3
Consider the axial laminar flow between two parallel porous plates separated by a distance 2W. There...
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