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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >An Eulerian-Lagrangian approach for the Numerical Simulation and Visualization of two-dimensional fluidized beds
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An Eulerian-Lagrangian approach for the Numerical Simulation and Visualization of two-dimensional fluidized beds

机译：二维流化床数值模拟和可视化的欧拉方法

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This paper deals with an Eulerian-Lagrangian model for dispersed multiphase flow in which all the interactions of any kind are taking into account. The fluid phase and particles interactions are two way coupled while all the collisions between the particles or between the particles and the walls are calculated. The Navier-Stokes equations (fluid phase continuity and momentum equations including exchange from the particle to the fluid is modeled to simulate the effect of the presence of the particles in the fluid phase) are solved on a staggered Eulerian grid by a finite volume discretisation type method. The originality of the Lagrangian approach used here for the particles motion, lies in the way of managing the collisions which are calculated using simple mechanical models such as a spring, dashpot and friction slider at the contact points following the Distinct Element Method DEM. In the Lagrangian stage, motion's calculation of each discrete particle including collisions effects is generally time consuming. In the context of this paper we shall show how to optimized the contacts tracking algorithm in an efficient way to increase significantly the capability of the DEM.
机译：本文研究了一种用于分散多相流的欧拉-拉格朗日模型，其中考虑了所有类型的相互作用。在计算颗粒之间或颗粒与壁之间的所有碰撞时，液相和颗粒之间的相互作用是双向耦合的。 Navier-Stokes方程（包括从粒子到流体的交换的流体相连续性和动量方程，通过模拟来模拟流体相中粒子的存在的影响）通过有限体积离散类型在交错的欧拉网格上求解方法。拉格朗日方法在此处用于粒子运动的独创性在于管理碰撞的方式，该碰撞是使用简单的机械模型（例如弹簧，阻尼器和摩擦滑块）在不同元素方法DEM的接触点处计算得出的。在拉格朗日阶段，计算每个包含碰撞效果的离散粒子的运动通常很耗时。在本文的上下文中，我们将展示如何以有效方式优化联系人跟踪算法，以显着提高DEM的能力。

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