Abstract The accurate prediction of the drag force exerted by a fluid on assemblies of particles is critical to simulate key characteristics of gas-solid systems such as the bed expansion in fluidized beds. To this end, a lattice Boltzmann method has been applied to compute the drag force acting on assemblies of cubes for a wide range of Reynolds numbers, Re V = 0 - 200 , and solid volume fractions, ϕ = 0.1 - 0.45 . The numerical data was used to propose a new drag force correlation for assemblies of cubes as a function of the Reynolds number and solid volume fraction. The new drag force correlation is expected to improve the accuracy of Euler-Euler and Euler-Lagrangian simulations of cubic particles.

中文翻译：

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立方粒子集合的拖曳力相关性的发展：固体体积分数和雷诺数的影响

摘要 准确预测流体对颗粒集合体施加的拖曳力对于模拟气固系统的关键特性（例如流化床中的床膨胀）至关重要。为此，已应用格子 Boltzmann 方法来计算作用在各种雷诺数 Re V = 0 - 200 和固体体积分数 ϕ = 0.1 - 0.45 的立方体组件上的阻力。数值数据用于提出立方体组件的新阻力相关性，作为雷诺数和固体体积分数的函数。新的阻力相关性有望提高立方粒子的欧拉-欧拉和欧拉-拉格朗日模拟的准确性。