For the long-term dynamic simulation of a fluidized bed reactor (FBR), a two-way coupled computational fluid dynamics (CFD)-direct quadrature method of moments (DQMOM) approach is proposed. In this approach, CFD is first used only for hydrodynamic information without simulating any other chemical reactions or physical phenomena. Subsequently, the derived information is applied to the DQMOM calculation in MATLAB. From the calculation, a particle size distribution is obtained and subsequently adopted in a new CFD model to reflect the flow change caused by a change in the particle size distribution. Through several iterative calculations, long-term dynamic simulations are performed. To evaluate the efficacy of the proposed approach, the results from the suggested approach are compared for 60 s with those of the CFD-quadrature method of moments (QMOM) approach, which calculates hydrodynamics and physical phenomena simultaneously in CFD. The proposed approach successfully simulated the FBR for 6 h. The results confirmed that the proposed method can simulate complex flow patterns, which cannot be obtained in conventional CFD models. Another advantage of the approach is that it can be applied to various industrial multiphase reactors without any tuning parameters.

为了对流化床反应器（FBR）进行长期动态仿真，提出了一种双向耦合计算流体动力学（CFD）-矩量直接正交方法（DQMOM）的方法。在这种方法中，CFD首先仅用于流体动力学信息，而无需模拟任何其他化学反应或物理现象。随后，将导出的信息应用于MATLAB中的DQMOM计算。通过计算，获得了粒度分布，随后将其用于新的CFD模型中，以反映由粒度分布变化引起的流量变化。通过多次迭代计算，可以进行长期动态仿真。为了评估该方法的有效性，建议方法的结果与CFD矩矩方法（QMOM）的方法进行了60 s的比较，后者可以同时计算CFD中的流体动力学和物理现象。所提出的方法成功模拟了6小时的FBR。结果证实，该方法可以模拟复杂的流型，这是常规CFD模型无法获得的。该方法的另一个优点是可以将其应用于各种工业多相反应器而无需任何调整参数。