细粒散料气动分离过程的数值模拟

E. Aliiev, I. Babyn, Serhiy Sokol
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引用次数: 0

摘要

细粒体材料气动分离的数值模拟方法多种多样,包括离散元法、有限元法和有界域法。在所有这些方法中,这些方程都是数值求解的,结果用于确定空气和粒子的轨迹和速度。本研究将基于离散元法(DEM)对物料的颗粒流动进行建模。本研究的目的是在Simcenter STAR-CCM+软件包中模拟细粒松散物料在气流影响下的运动,并计算其气动分离参数。选择以下物理模型:气体、二维、分离流、梯度、理想气体、等温流体能量方程、非定常隐式、湍流、Navier-Stokes方程的Reynolds平均、K-Epsilon湍流模型、可容许的两层K-Epsilon湍流模型、壁面距离、任意y+的双层、重力、拉格朗日多相、DEM离散元模型、多相相互作用。通过Simcenter STAR-CCM+软件包对细粒松散物料在气流影响下的运动进行数值模拟,构建了其组分在分离器区域内的分布。采用以下参数作为研究因素:在Wolfram Cloud软件包中对获得的数据集进行处理的结果基础上,建立了两馏分分布交点位置(距离x)和分离液区杂质含量δ的变化规律,并对研究因素进行了分析。所提出的详细数值模拟方法可用于研究其他细粒松散物料的分离方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
NUMERICAL SIMULATION OF THE PROCESS OF AERODYNAMIC SEPARATION OF FINE-GRAINED BULK MATERIAL
Various methods can be used to numerically simulate the aerodynamic separation of fine-grained bulk material, including discrete element methods, finite element methods, and bounded domain methods. In all these methods, these equations are solved numerically, and the results are used to determine the trajectories and velocities of air and particles. The Discrete Element Method (DEM), on the basis of which the study will be conducted, is designed for modeling the granular flow of materials. The purpose of the research is to simulate the movement of fine-grained loose material under the influence of air flow and calculate the parameters of its aerodynamic separation in the Simcenter STAR-CCM+ software package. The following were selected as physical models: gas, two-dimensional, separated flow, gradients, ideal gas, isothermal fluid energy equation, unsteady implicit, turbulent, Reynolds averaging of the Navier-Stokes equation, K-Epsilon turbulence model, admissible two-layer K-Epsilon, wall distance, double layer for any y+, gravity, Lagrangian multiphase, DEM discrete element model, multiphase interaction. As a result of the numerical simulation of the movement of fine-grained loose material under the influence of the air flow in the Simcenter STAR-CCM+ software package, the distribution of their components in the area of the separator was constructed. The following parameters were adopted as research factors: the diameter of the particles of the liquid fraction and impurities d, the particle supply speed f, the air flow speed v. Based on the results of the processing of the obtained data set in the Wolfram Cloud software package, the patterns of changes in the position of the intersection line of the distribution of two fractions (distance x) and the content of impurities δ in the liquid zone of separation from research factors were established. The presented detailed method of numerical modeling can be used to study other methods of separation of fine-grained loose materials.
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