Magnetic density separation (MDS) is a technique for separating granular materials based on mass density. MDS uses magnetically responsive fluids and engineered magnetic fields to create a vertical gradient of apparent mass density inside the fluid. We present a numerical study to investigate the effect of honeycomb wake turbulence on the motion of almost neutrally buoyant spherical particles in a magnetized fluid. A four-way coupled Euler-Lagrange approach is used where particles are effectively treated as finite-size point particles. It is shown that the honeycomb-generated wake turbulence increases the levitation time of the particles. The presence of particles results in an earlier break-up of the individual velocity profiles stemming from the honeycomb cells. The effects of honeycomb geometry and cell Reynolds number on the collective motion of particles and turbulence properties are investigated, where the choice for the best honeycomb is a trade-off between the separation error and the particle flux.

磁密度分离（MDS）是一种基于质量密度分离颗粒材料的技术。MDS 使用磁响应流体和工程磁场在流体内部产生表观质量密度的垂直梯度。我们提出了一项数值研究，以研究蜂窝尾流湍流对磁化流体中几乎中性浮力球形颗粒运动的影响。使用四向耦合欧拉-拉格朗日方法，其中粒子被有效地视为有限大小的点粒子。结果表明，蜂窝产生的尾流湍流增加了粒子的悬浮时间。颗粒的存在会导致蜂窝单元产生的单个速度分布提前破裂。