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130 kg of uniform spherical particles with a diameter of 60 mm and particle density 1500...
130 kg of uniform spherical particles with a diameter of 60 mm and particle density 1500 kg/m3 are fludised by water (density 1000 kg/m3, viscosity 0.001 Pa s) in a circular bed of cross-sectional area 0.2 m2. The single particle terminal velocity of the particles is 0.98 mm/s and the voidage at incipient fludisation is known to be 0.47. Determine:
The minimum fludised velocity and the bed height at incipient fludisation.
The mean fludised bed voidage and height when the liquid flow rate is 2x10-5 m3/s.
Solutions
Amanda K answered 6 months agoRelated Solutions
130 kg of uniform spherical particles with a diameter of 60 mm and particle density 1500...
130 kg of uniform spherical particles with a diameter of 60 mm
and particle density 1500 kg/m3 are fludised by water
(density 1000 kg/m3, viscosity 0.001 Pa s) in a circular
bed of cross-sectional area 0.2 m2. The single particle
terminal velocity of the particles is 0.98 mm/s and the voidage at
incipient fludisation is known to be 0.47. Determine:
a. The minimum fludised velocity
b. height when the liquid flow rate is 2x10-5
m3/s.
A packed bed of uniform spherical particles of diameter, d= 2.5 mm, density ρs= 4000 kg/m3...
A packed bed of uniform spherical particles of diameter, d= 2.5
mm, density ρs= 4000 kg/m3 , and voidage e= 0.45 is fluidised by
means of a liquid of viscosity μ= 1 mN s/m2 and density ρ= 900
kg/m3 . (a) Starting from Carman’s and Ergun’s equations reported
in the attached equations sheet, derive the corresponding
expressions for the minimum fluidising velocity, umf, for both
equations and explain their meaning.
Q. Spherical glass particles (12 mm diameter and 2500 kg/m 3 density) and spherical metal particles...
Q. Spherical glass particles (12 mm diameter and 2500 kg/m 3
density) and spherical metal particles (1.5 mm diameter and 7500
kg/m3) are falling in water (density= 1000 kg/m3) .
(1) Calculate the terminal falling velocities of glass and metal
particles in water for a constant friction factor of 0.22.
(2) At what water velocity will fluidized beds of glass
particles and metal particles have the same bed densities?
The relation between fluidization velocity (uc),
terminal velocity (ut) and bed...
Approximately spherical particles of diameter 150? and density 2650 kg/m3 settle through a liquid of density...
Approximately spherical particles of diameter 150? and density
2650 kg/m3 settle through a liquid of density 1097 kg/m3 and
dynamic viscosity 3.8 mPa s. The volume fraction of particles is
30% in a container of internal diameter 2 cm
Calculate: a)The absolute settling velocity that is apparent to
the stationary observer in the lab frame. b)The slip velocity (Us)
between solid and liquid phases. c) The superficial velocity of the
particles in the lab frame.
A 1-mm diameter sphere (density=7900 kg/m3) is dropped into a tank of oil (density=900 kg/m3). The...
A 1-mm diameter sphere (density=7900 kg/m3) is
dropped into a tank of oil (density=900 kg/m3). The
sphere develops a terminal speed of 0.25 cm/s, what is the oil's
viscosity? You may assume a small Reynolds number. Show your
work.
21. Assume that spherical particles with diameter=100 μm and density=1.1 g/cm3 have sedimentation velocity of 1...
21. Assume that spherical particles with diameter=100 μm and
density=1.1 g/cm3 have sedimentation velocity of 1 cm/min in a
solution with density=1 g/cm3. What is the sedimentation velocity
of spherical particles with diameter=50 μm and density=1.3 g/cm3 in
the same conditions?
A 60 kg Drum of diameter 40 cm containing waste material of density 1100 kg/m^3 is...
A 60 kg Drum of diameter 40 cm containing waste material of
density 1100 kg/m^3 is being lifted by a steel cable of diameter 30
mm. When the drum is hoisted 10m the natural frequency is measured
to be 40 Hz. Determine the volume of the waste in the drum.
A tube with a diameter of 6.45 mm was placed in a liquid with a density...
A tube with a diameter of 6.45 mm was placed in a liquid with a density of 998 kg / m3 and it was observed that the liquid increased by 1.44 mm in the tube. Find the surface tension of the fluid [N / m] by taking the contact angle 15 ° between the liquid and the tube surface.
Solid particles (diameter 1.5 x 10-4 m, average density = 2800 kg/m3) are settling in water...
Solid particles (diameter 1.5 x 10-4 m, average
density = 2800 kg/m3) are settling in water at 30 °C. The
properties of water at this temperature are viscosity (µ) = 8 x
10-4 kg/m.s and density (p) = 996 kg/m3
a) What is the terminal velocity for the particles?
b) What would be the velocity of the system in a separator with
an acceleration of 390 m/s2?
Spherical particles of a protein of density 1.50 g/cm are shaken up in a solution of...
Spherical particles of a protein of density 1.50 g/cm are shaken
up in a solution of 20°C water. The solution is allowed to stand
for 1.00 h. If the depth of the water in the tube is 6.00 cm, find
the radius of the largest particles that remain in solution (i.e.
haven’t yet reached the bottom of the tube) at the end of the hour.
The viscosity of 20°C water is 1.00 × 10−3 Pa⋅s.
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