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The velocity profile in the annular control volume of Example is approximately linear, varying from a velocity of zero at the outer boundary to a value of ωd/2 at the inner boundary. Develop an expression for the fluid velocity, v(r), where r is the distance from the center of the shaft.
ExampleA shaft is rotating at constant angular velocity ω in the bearing shown in Figure. The shaft diameter is d and the shear stress acting on the shaft is τ. Find the rate at which energy must be removed from the bearing in order that the lubricating oil between the rotating shaft and the stationary bearing surface remains at constant temperature.
permit a user to input a number between 1 to 10. store this value as the variable numberofresistors. this will be used
A gas initially at 14 bar and 60°C expands to a final pressure of 2.8 bar in an isothermal, internally reversible process. Determine the heat transfer and the work, each in kJ per kg of gas, if the gas is (a) Refrigerant 134a, (b) air as an ideal ..
a power generator burns natural gas consisting of 30 ethane 60 methane and the balance nitrogen. the gas undergoes
Describe trend, seasonality, random variation, and cycle as applied to forecasting.
consider an air conditioning system where warm humid air flows first over cooling coils where it is cooled and
steam is flowing in a line at 100 bar. it is flashed out through a valve to 1 bar pressure. the temperature of the
A new design is proposed for an automobile. It is suggested that a 1:5 scale model study be done to access the proposed design for a speed of 90 km=h.
Data for steady-state operation of a vapor-compression refrigeration cycle with propane as the working fluid are given in the table below. The states are numbered as in Fig. 10.3. The mass flow rate of refrigerant is 8.42 lb/min. Heat transfer fro..
earth is required to be excavated from borrow pits for building an embankment. the wet unit weight of undisturbed soil
By how much will the clamping force on the joint be reduced? Sketch the new joint diagram, assuming maximum initial preload?
Design a damper (that is, choose a value of c) such that the maximum deflection at steady state is 0.05 m.
two heavily insulated tanks are connected by a valve. tank a has a volume of 600l and contains water at 200kpa and
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