颗粒惯性聚集现象的数值优化方法

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英文篇名：Numerical Optimization Method of Inertial Focus of Particles 作者：薛壮壮 ; 王企鲲 英文作者：XUE Zhuangzhuang;WANG Qikun;School of Energy & Power Engineering,University of Shanghai for Science & Technology; 关键词：微通道 ; 悬浮颗粒 ; 惯性聚集 ; 惯性升力 ; 割线法 ; CFD 英文关键词：microchannel;;suspended particles;;inertial focus of particles;;inertial lift;;secant method;;CFD 中文刊名：QGJX 英文刊名：Light Industry Machinery 机构：上海理工大学能源与动力工程学院; 出版日期：2019-05-28 10:19 出版单位：轻工机械 年：2019 期：v.37;No.159 基金：国家教育部博士点基金资助项目(20113120120003) 语种：中文; 页：QGJX201903005 页数：5 CN：03 ISSN：33-1180/TH 分类号：31-35

摘要

为研究微通道内悬浮颗粒的惯性聚集现象,基于"运动相对性"原理,运用数值方法对颗粒在聚集过程中所受的惯性升力进行计算。利用相对运动模型进行计算时,其关键点在于对所需计算的横向位置处的颗粒沿主流方向的稳定运动速度的确定;通过"试凑法"对其进行近似确定,采用二分法、割线法和抛物线法等方法在相同条件下进行试凑计算。比较上述方法在试凑颗粒稳定状态下平动速度和转动角速度的难易程度,结果表明"割线法"在试凑过程中具有明显的优势,该算法求解颗粒平动速度和转动角速度时快速、高效及可靠。
        In order to study the phenomenon of inertial focus of particles in microchannel,based on the principle of motion relativity,the numerical method was used to calculate the inertial lift of the particles during the aggregation process. By using the relative motion for calculation,the key point was the determination of the steady motion velocity of the particles in the direction of the main flow at the required lateral position. In this paper,the method was approximated by trial and error method,and the methods such as dichotomy,secant line and parabola were used for trial and error calculation under the same conditions. The results show that the secant method has obvious advantages in the process of trial and assembly. The algorithm is faster,more efficient and more reliable in solving the translational and rotational angular velocities of particles.

引文

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