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Consider the thick slab of copper in Example 5.12, which is initially at a uniform temperature of 20 C and is suddenly exposed to a net radiant flux of 3 × 105 W/m2. Use the Finite-Difference Equations/ One-Dimensional/Transient conduction model builder of IHT to obtain the implicit form of the finite-difference equations for the interior nodes. In your analysis, use a space increment of ?x = 37.5 mm with a total of 17 nodes (00-16), and a time increment of ?t = 1.2 s. For the surface node 00, use the finite-difference equation derived in Section 2 of the Example.
(a) Calculate the 00 and 04 nodal temperatures at t = 120 s, that is, T(0, 120 s) and T(0.15 m, 120 s), and compare the results with those given in Comment 1 for the exact solution. Will a time increment of 0.12 s provide more accurate results?
(b) Plot temperature histories for x = 0, 150, and 600 mm, and explain key features of your results.
Compare the sound-level-meter weighting-characteristic curves with the loudness curves of 40, 70, and 90 phon, corresponding to the A, B, and C scales, respectively.
1. What is a dispersion-strengthened composite? How is it different from a particle-reinforced composite?
a pump steadily draws water at a mass flow rate of 20 lbms through a piping arrangement. the pressure at the inlet is
But on the other hand, how could you justify spending scarce resources in rural areas when you know that this would benefit far fewer people than if you spent the money in cities instead?
Calculate the position of poid D when Piston 1 is retracted 8 in from fully extented position. Calculate the force developed by the actuator when Piston 1 is retracted 8 in from fully extented position.
For the turbine-compressor arrangement of Problem 6.164, determine the exergetic efficiency for (a) the turbine, (b) the compressor, (c) an overall control volume enclosing the turbine and compressor. Let T0 5 300 K.
A piston cylinder device contains 1 kg of steam at 500C and 2 MPa. The piston device is surrounded by a water vapor mixture with a quality of x=0.6. What is the maximum amount of heat that can be transferred between the piston cylinder device and the..
a small rankine power plant produces 25 kgs of steam at 3 mpa and 600degc in the boiler. it uses water from a river to
an ideal reheat rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000
assume that you are responsible for the design of a wide-plate tension member built from a structural aluminum. the
When isotherms for a Van der Waals gas are plotted on a p-V diagram, which are the considerations?
A vapor compression refrigeration cycle using R-134a as the working fluid has an evaporator temperature of -20°F, and a condenser pressure of 140 psia. The refrigerant is saturated at the inlet to the compressor and at the exit of the condenser. The..
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