Recently developed drag correlations for ellipsoidal particles are applied in a Lagrangian point-particle model. The results are directly compared against a popular Lagrangian model based on the dynamic equations valid for Stokes flow for the canonical case of settling ellipsoids in isotropic decaying turbulence. For increasing terminal velocities, the pitching torque due to fluid inertia dominates the torque contribution due to the fluid velocity gradient. Consequently, the major axis is preferentially oriented perpendicular to the settling direction. The opposite is predicted, if the new correlations for ellipsoidal particles are not included in the Lagrangian model. The combined effect of the pitching torque and the drag correlations leads to significantly different settling velocities for the varying correlations. The results based on a constant particle relaxation time for various particle diameters show that the particle Reynolds number is a relevant parameter in a multiphase system even for relatively moderate particle Reynolds numbers $R{e}_p\le 4$.

在拉格朗日点粒子模型中应用了最近开发的椭球粒子的阻力相关性。将结果与流行的拉格朗日模型直接进行比较，该模型基于对各向同性衰减湍流中沉降椭球的典型情况下对斯托克斯流有效的动力学方程。为了增加终端速度，由于流体惯性引起的俯仰转矩在由于流体速度梯度引起的转矩贡献中占主导地位。因此，主轴线优选垂直于沉降方向定向。如果拉格朗日模型中不包含椭圆体粒子的新相关性，则可以预测相反的结果。俯仰转矩和阻力相关性的组合效应导致变化的相关性产生明显不同的沉降速度。$\mathrm{[R}{Ë}_p\le 4$。