| 固体颗粒在热对流下沉降的直接数值模拟研究 |
| |
| 引用本文： | 常建忠,安康,刘汉涛.固体颗粒在热对流下沉降的直接数值模拟研究[J].力学学报,2010,42(2):205-211. |
| |
| 作者姓名： | 常建忠 安康 刘汉涛 |
| |
| 作者单位： | 太原中北大学机电工程学院太原中北大学机电工程学院太原中北大学机电工程学院 |
| |
| 基金项目： | 山西省人才专项基金(20060403JJ);;国家自然科学基金(50976108)资助项目~~ |
| |
| 摘 要： | 在任意拉格朗日-欧拉算法模拟等温惰性颗粒两相流的基础上，增加对能量方程的联立求解，在热对流条件下对固体颗粒在不同雷诺数下的沉降规律进行了直接数值模拟.结果表明:热对流引起了流场流动的变化和不对称，颗粒在热流体中沉降，热对流产生的力加速了冷颗粒的运动，尾部形成了涡脱落；颗粒在冷流体中沉降，热对流产生的力阻碍了冷颗粒的运动，尾部形成了羽流. 随着雷诺数的增大，颗粒经历了稳定沉降、周期性摆动到不稳定、无规则运动3个阶段.
|
| 关 键 词： | 直接数值模拟 颗粒两相流 热对流 沉降 任意拉格朗日-欧拉法 |
| 收稿时间： | 2008-10-21 |
| 修稿时间： | 2009-03-16 |
THE STUDY ON THE SEDIMENTATION OF SOLID PARTICLE INFLUENCED BY THERMAL CONVECTION USING DIRECT NUMERICAL SIMULATION |
| |
| Chang Jianzhong
,
An Kang
,
Liu Hantao.THE STUDY ON THE SEDIMENTATION OF SOLID PARTICLE INFLUENCED BY THERMAL CONVECTION USING DIRECT NUMERICAL SIMULATION[J].chinese journal of theoretical and applied mechanics,2010,42(2):205-211. |
| |
| Authors: | Chang Jianzhong An Kang Liu Hantao |
| |
| Institution: | School of Mechatronice Engineering of North University of China, Taiyuan 030051, ChinaSchool of Mechatronice Engineering of North University of China, Taiyuan 030051, ChinaSchool of Mechatronice Engineering of North University of China, Taiyuan 030051, China |
| |
| Abstract: | Based on the study of isothermal inert particle sedimentation,the Arbitrary Lagrangian-Eulerian technique was used to solve the problem of solid particle sedimentation with thermal convection including the energy equation,according to varying the solid-fluid density ratio,that is,the particles settle in different Reynolds number.The results show that the thermal convection induces the variety of flow field and asymmetry. While setting in hot fluid,the direction of thermal convection is the same as that of p... |
| |
| Keywords: | direct numerical simulation two-phase flows thermal convection sedimentation Arbitrary Lagrangian-Eulerian |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《力学学报》浏览原始摘要信息 |
| 点击此处可从《力学学报》下载免费的PDF全文 |
