Lattice Boltzmann simulations to determine drag, lift and torque acting on non-spherical particles

Lattice Boltzmann simulations to determine drag, lift and torque acting on non-spherical particles The drag, lift and moment coefficients of differently shaped single particles have been determined as a function of the angle of incidence at particle Reynolds numbers between Re = 0.3 and 240 under different conditions. For this purpose simulations of the flow around these particles have been performed using the three-dimensional Lattice Boltzmann method. In the first case studied a particle is fixed in a uniform flow, in the second case the particle is rotating in a uniform flow to determine, among others, the Magnus lift force and in the third case the particle is fixed in a linear shear flow. In the first case six particle shapes are considered, i.e. a sphere, a spheroid, a cube, a cuboid and two cylinders with an axis ratio of 1 and 1.5, respectively. In the second and third case the sphere and the spheroid are considered. At the higher Re considered, the drag depends strongly on particle shape, the angle of incidence and particle rotation. The lift and the torque of both the sphere and the spheroid are strongly affected by particle rotation and fluid shear. For approximately Re ⩽ 1, the shear induced lift for unbounded flow could not be simulated as the top and bottom wall have a significant influence in the current flow configuration. The shear induced lift of the sphere changes direction at approximately Re = 50 and the mean (over the orientation) shear induced lift of the spheroid changes direction at approximately Re = 90. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Computers & Fluids Elsevier

Lattice Boltzmann simulations to determine drag, lift and torque acting on non-spherical particles

Computers & Fluids, Volume 38 (3) – Mar 1, 2009

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Publisher
Elsevier
Copyright
Copyright © 2008 Elsevier Ltd
ISSN
0045-7930
eISSN
1879-0747
D.O.I.
10.1016/j.compfluid.2008.06.001
Publisher site
See Article on Publisher Site

Abstract

The drag, lift and moment coefficients of differently shaped single particles have been determined as a function of the angle of incidence at particle Reynolds numbers between Re = 0.3 and 240 under different conditions. For this purpose simulations of the flow around these particles have been performed using the three-dimensional Lattice Boltzmann method. In the first case studied a particle is fixed in a uniform flow, in the second case the particle is rotating in a uniform flow to determine, among others, the Magnus lift force and in the third case the particle is fixed in a linear shear flow. In the first case six particle shapes are considered, i.e. a sphere, a spheroid, a cube, a cuboid and two cylinders with an axis ratio of 1 and 1.5, respectively. In the second and third case the sphere and the spheroid are considered. At the higher Re considered, the drag depends strongly on particle shape, the angle of incidence and particle rotation. The lift and the torque of both the sphere and the spheroid are strongly affected by particle rotation and fluid shear. For approximately Re ⩽ 1, the shear induced lift for unbounded flow could not be simulated as the top and bottom wall have a significant influence in the current flow configuration. The shear induced lift of the sphere changes direction at approximately Re = 50 and the mean (over the orientation) shear induced lift of the spheroid changes direction at approximately Re = 90.

Journal

Computers & FluidsElsevier

Published: Mar 1, 2009

References

  • A numerical study of viscous flow past a thin oblate spheroid at low and intermediate reynolds numbers
    Pitter, R.L.; Pruppacher, H.R.; Hamielec, A.E.
  • Drag coefficients at low reynolds numbers for flow past immersed bodies
    Jones, A.M.; Knudsen, J.G.
  • The aerodynamics of golf balls
    Davies, J.M.
  • A shear flow around a spinning sphere: numerical study at moderate Reynolds numbers
    Salem, M.B.; Oesterle, B.
  • A computational study of the inertial lift on a sphere in linear shear flow field
    Cherukat, P.; McLaughlin, J.B.; Dandy, D.S.
  • Effect of free rotation on the motion of a solid sphere in linear shear flow at moderate Re
    Bagchi, P.; Balachandar, S.
  • Momentum transfer of a Boltzmann-lattice fluid with boundaries
    Bouzidi, M.; Firdaouss, M.; Lallemand, P.
  • Three-dimensional numerical simulation of the transition of flow past a cube
    Saha, A.K.
  • Drag and oscillatory motion of freely falling cylindrical particles
    Marchildon, E.K.; Clamen, A.; Gauvin, W.H.
  • Hydrodynamics
    Lamb, H.

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