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A packed bed has been prepared in a 12 inch diameter pipe with solid cylinder particles having an effective diameter of D(p) = 5 mm and sphericity of 0.83. The bed height is 4 meters. The void fraction/porosity is 0.6. A gas of density 1.83kg/m^3 and a viscosity of 1.5 x 10^-5 Pa.s is pumped through the tower. The volumetric flow rate of the gas at the entrance is 20 m^3/hour. a. Calculate the pressure drop at the exit of the packed bed. b. Comment on the nature of the fluid flow (laminar and turbulent) through the packed bed.
Thickness is to be reduced in three steps in a hot rolling operation. Each step will reduce the slab to 75% of its previous thickness. It is expected that for this metal and reduction, the slab will widen by 3% in each step.
Maximum value of frequency deviation is fixed at 75 kHz for commercial broadcasting by radio. Modulation frequency W = 15 kHz, then find the transmission bandwidth of signal and deviation ratio.
1.Calculate motor speed in revolutions per minute for an eight-pole,50Hz motor. Give the equation and identify its parts; show your math. 2.You need to detect finished products coming down an assembly line.
Suppose a car of mass m moving on a straight west-east highway at velocity v(t) (positive for motion from west to east) experiences aerodynamic drag force with magnitude v(t) opposing its motion.
For a 64-PSK modulator with an input data rate(fb) equal to 36 Mbps and a carrier frequency of 100 MHz, determine the minimum double-sided Nyquist bandwidth(fN) and the baud. Sketch the output spectrum.
Water is the working fluid in a vapor power cycle with reheat, superheat and reheat. Superheated steam enters the first turbine stage at 8 MPa, 480 C and expands to 0.7 MPa
If the energy gap separating the valence and conduction bands in diamond is 5.4 eV, what is the maximum wavelength (in metres) of radiation that can be absorbed by this material
A pulsar lies 1000 light years from Earth. The average plasma concentration is 1 el/cc. Using the plasma dispersion relationship for group speed, what is the group delay between a pulsar pulse received at 1 GHz and at 800 MHz
A second method of development will recover only 50% of the ore deposit , but it will cost only $15 per ton of material removed.Subsequent processing of the removed ore recovers 300 pounds of metal from each ton of processed ore and cost $40 per ..
Let a = 2 + j and b = 3 - xj be complex numbers where 'x' is an arbitrary constant. Let c = ab (i.e., complex number 'c' is the product of 'a' and 'b'). Calculate the magnitude of c as a function on constant 'x'.
There is a 50 Mhz clock signal on the FPGA board. we want to have a 1 Hz signal for testing all the designs. Find out what size of the counter we need in order to obtain this signal from the on board clock.
3-phase line, which has an impedance of 2 + j4 per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y-connected with an impedance of (20 + j40) per phase
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