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An insulation system around a cylindrical pipe consists of two different layers. The first layer immediately on the outer surface of the pipe is made of glass wool and the second one is constructed using plaster of Paris. The cylinder diameter is 10 cm and each insulating layer is 1 cm thick. The thermal conductivity of the glass wool is 0.04 W/m °C and that of the plaster is 0.06 W/m °C. The cylinder carries hot oil at a temperature of 92 °C, and the atmospheric temperature outside is 15 °C. If the heat transfer coefficient from the outer surface of the insulation to the atmosphere is 15 W/m2 °C, calculate the temperature at the interface between the two insulating materials and on the outer surface.
For a starting value of x = 1.0. Try various values of the size of the time step to see the effect on the results. What happens when the time step is very small or very large?
Need to get flow around cylinders in a channel by creating a grid and specifying the intial flow velocity.
It is given that a- iron has a BCC crystal structure, an atomic radius R = 0.124 nm, and atomic weight AFe = 55.85 g/mol. Calculate the following quantities for a- iron: Lattice parameter. Total number of atoms in the unit cell. Volume of the unit ce..
a centrifuge is used to remove solids from a 14.0 ppg mud using 8.33 ppg water. the mud and water enter the centrifuge
design a process for the manufacture of 106 kg per year of mayonnaise. the shelf life of the product is expected to be
Determine the minimum and maximum local membrane temperatures for top and bottom flows that are in the same, opposite, and orthogonal directions. Which flow configuration minimizes the membrane temperature?
crude oil flows through a level section of the alaskan pipeline at a given rate in millions of barrels per day1 barrel
the rate of heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine.
the position vector of a particle moving in the x-y plane at time t3 sec is rt32i-3j m. at time t5 sec its position
a freshly drawn glass fiber 100 microm in diameter breaks under a tensile load of 40 kn . after subsequent handling a
Determine the temperature of the water at this pressure.
One-tenth kilogram of air as an ideal gas with k 5 1.4 executes a Carnot refrigeration cycle, as shown in Fig. 5.16. The isothermal expansion occurs at 2238C with a heat transfer to the air of 3.4 kJ. The isothermal com..
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