Direct Numerical Simulation for Three-Dimensional Gas-Solid Two-Phase Jet Using Two-Way Method and Experimental Verification.
Direct Numerical Simulation for Three-Dimensional Gas-Solid Two-Phase Jet Using Two-Way Method and Experimental Verification.
复制标题
二维气固两相射流直接数值模拟及实验验证。
DOI：
10.1299/jsmeb.39.230
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Masaharu Tabuchi
中科院分区：
文献类型：
--
作者：
S. Yuu;T. Umekage;Masaharu Tabuchi
随着超级计算机技术的发展，基于Navier-Stokes方程和拉格朗日颗粒运动方程的气固两相射流直接数值模拟已成为可能，无需任何假设和简化模型。在这项研究中，三维欧拉空气速度和拉格朗日粒子轨迹同时计算，以描述颗粒和空气之间的相互作用，使用双向方法。虽然网格尺寸约为Kolmogorov微尺度的7倍，但计算的空气和颗粒的湍流特性（平均速度分布和湍流强度分布）与使用激光多普勒风速仪获得的实验数据相当吻合。这意味着模拟很好地描述了大尺度涡的运动，这些涡在湍流气固两相流的形成中起着重要作用。
Current progress in the field of supercomputers has made possible the direct numerical simulation of the gas-solid two-phase jet based on the Navier-Stokes equation and the Lagrangian equation of particle motion without the use of any assumptions or simplified models. In this study, three-dimensional Eulerian air velocities and Lagrangian particle trajectories are simultaneously calculated to describe the interaction between particles and air using a two-way method. Although the mesh size is roughly seven times the Kolmogorov microscale, the calculated turbulent characteristics of air and particles (mean velocity distributions and turbulent intensity distributions) are in fairly good agreement with experimental data obtained using laser Doppler anemometry. This means that the simulation well describes the motion of large-scale eddies which play an important role in the formation of turbulent gas-solid two-phase flow.