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Direct numerical simulation on the influence of solid-liquid density ratio on the particle sedimentation under thermal convection

Tong Zhi-Hui

Direct numerical simulation on the influence of solid-liquid density ratio on the particle sedimentation under thermal convection

Tong Zhi-Hui
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  • Abstract views:  3761
  • PDF Downloads:  844
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Publishing process
  • Received Date:  24 February 2009
  • Accepted Date:  12 June 2009
  • Published Online:  15 March 2010

Direct numerical simulation on the influence of solid-liquid density ratio on the particle sedimentation under thermal convection

  • 1. 中北大学能源环境工程与计算流体力学实验室,太原 030051

Abstract: The arbitrary Lagrangian-Eulerian technique was used in the direct numerical simulation of the sedimentation of particle with thermal convection between parallel walls. The fluid motion is computed from the Navier-Stokes equation and energy equation using the finite-element method. The particle was tracked according to the equations of motion of a rigid body under the action of gravity and hydrodynamic forces arising from the motion of the fluid, the model was used without former experience or presumption. The results shows that the particle experiences different regimes of motion: steady motion with and without overshoot and weak, strong and irregular oscillations. The thermal convection changes the sedimentation velocity and the oscillation amplitude of the particle,and the impact of particle by the thermal convection was decreased with solid-liquid density ratio increasing.

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