2. A unknown fluid at 20°C fills the following portion of a sleeve with an inner diameter of 11.8 cm and hasa fixed coaxial cylinder of diameter 11.6 cm which rotates at 120 rpm. The torque generated is 23.40084214N-m per meter of rod length. What is the fluid used and its kinematic viscosity?

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Answered: 2. A unknown fluid at 20°C fills the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A shaft 70.0 mm in diameter is being pushed at a speed of 400 mm/s through a bearing sleeve 70.2 mm in diameter and 250 mm long. The clearance, assumed uniform, is filled with oil at 20 deg C with kinematic viscosity of 0.005 m^2/s and specific gravity 0.9. If the shaft is fixed axially and rotated inside the sleeve at 2000 rpm, determine the power required to rotate the shaft.
3.1 A cylindrical plug, 120mm long with a diameter of 95 mm, slides concentrically in a fixed cylinderwith an internal diameter of 95,2 mm. The radial clearance is filled with oil with a viscosity of 0.2 Pa.sCalculate the Force required to slide the plug along the cylinder at a speed of 5 m/s against the viscousresistance of the oil, the power lost due to the viscous resistance and the Kinematic viscosity of the oil ifits density is 850 kg/m 3 . A pressure intensifier is used in reverse deboost the pressure in a hydraulic system from 15MPa to7MPa. The volume of fluid required in the low pressure side is 700ml and the length of the stroke of thepiston is to be half the diameter of the low pressure piston. Calculate the diameters of the high-pressureand low pressure sides as well as the stroke length of the piston.
A concentric cylinder viscometer may be formed by rotating the inner member of a pair of closely fitting cylinders. The annular gap is small so that a linear velocity profile will exist in the liquid sample. Consider a viscometer with an inner cylinder diameter of 4 in, a height of 8 in, and a clearance gap width of 0.001 in, filled with castor oil at 90 oF. Determine the torque (in lbf×ft) require to turn the inner cylinder at 400 rpm. The dynamic viscosity of the caster oil is 0.0079 lbf×s /ft2.
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A torque is applied to rotate a cylindrical shaft (diameter D 1 , length L) at a constant angularspeed ω, inside a co-axial, stationary cylinder of the same length and diameter D 2. The gapbetween the bottom surface of the shaft and that of the stationary cylinder is h.(a) Develop a general expression of the torque in terms of the geometric dimensions andthe viscosity μ of an oil filling the gaps between the shaft and the stationary cylinder.Assume linear velocity profiles in all the gaps.(b) Determine the numerical value of the torque in the case of an oil of viscosity of 0.1Pa.s. [D 1=5cm, D 2=5.2cm, L=10cm, ω=50rpm, h=1mm]
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PROB 3 A capillary tube is being used to measure the viscosity of a Newtonianliquid. The has a 20-mm radius and a length of 20-cm. Estimate theviscosity coefficient for the liquid if the pressure of 2500 Pa is required tomaintain a flow rate of 1 kg/s with ρ = 998 kg/m3
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Two concentric cylinders are rotating in opposite directions but the same speed, 25 revolutions per minute. The outer cylinder, 11cm in diameter, is turning counterclockwise and the inner cylinder, 10 cm in diameter, is turning clockwise. The gap between the cylinders is filled with a liquid. The liquid is a Newtonian fluid with a viscosity of 0.1 kg/m.s. Both cylinders are 50 cm long. Assuming linear distribution of velocity in the gap, Sketch the velocity profile inside the liquid in the gap At what radial distance from the center of the cylinders the liquid velocity becomes zero? Find the shear rate Find force acting on each cylinder
This question is related to fluid mechanics
A flywheel weighing 700 N has a radius of gyration of 0.3 m located in a machine and rotating at 600 rpm. Its speed reduces at 0.8 rpm/s owing to fluid velocity between the sleeve and shaft. The sleeve length is 0.06 m, shaft diameter is 0.03m and radial clearance is 0.05 mm. Determine the fluid viscosity

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2. A unknown fluid at 20°C fills the following portion of a sleeve with an inner diameter of 11.8 cm and has a fixed coaxial cylinder of diameter 11.6 cm which rotates at 120 rpm. The torque generated is 23.40084214 N-m per meter of rod length. What is the fluid used and its kinematic viscosity?