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This article is cited in 1 scientific paper (total in 1 paper)
MECHANICS
Investigation of the prolate ellipsoidal particle motion in a swirling flow
O. V. Matvienkoa, A. V. Andriasyanb, N. A. Mamadraimovab, A. O. Andropovaa a Tomsk State University, Tomsk, Russia
b Tomsk State University of Architecture and Building
Abstract:
In this paper, the investigations of the prolate ellipsoidal particles movement in a swirling
flow were carried out.
The motion of small particles relative to the carrier fluid flow is insignificant. As a result, the
smallest particles move along a helical path at an approximately cylindrical surface. Large
particles affected by centrifugal force move to the walls of the outer cylinder along a conical
surface. Increasing of the angular velocity of the cylinders leads to an increase in the centrifugal
force which intensifies the radial motion of the particles to the outer cylinder. It is found that,
depending on the particle orientation in the space, both upward and downward motions are
possible.
The movement is caused by particular drag force influence on the ellipsoidal particle. The
drag force is characterized by the horizontal and vertical components. The horizontal component
for heavy particles with density value greater than that of the carrier medium is directed towards
the axis of symmetry. The direction of the vertical component of the drag force depends on the
orientation of the particles in the space.
Utilizing the particle slip velocity model, the regimes of upward and downward movement are
defined. Dependencies for the determination of particle velocity components are proposed. It is
found that the gravitational settling velocity of the particle decreases with an increase in the value
of the Froude number. In the case of a strong swirling flow, the motion of the particle becomes
upward.
Keywords:
mechanics of fluid, particles, dispersed phase, swirling flow, separation.
Received: 11.02.2016
Citation:
O. V. Matvienko, A. V. Andriasyan, N. A. Mamadraimova, A. O. Andropova, “Investigation of the prolate ellipsoidal particle motion in a swirling flow”, Vestn. Tomsk. Gos. Univ. Mat. Mekh., 2016, no. 3(41), 74–85
Linking options:
https://www.mathnet.ru/eng/vtgu530 https://www.mathnet.ru/eng/vtgu/y2016/i3/p74
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Abstract page: | 172 | Full-text PDF : | 63 | References: | 28 |
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