| 激光测速粒子对复杂流动的响应研究——Ⅱ典型流场中粒子跟随性的数值分析 |
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| 引用本文： | 黄社华,魏庆鼎.激光测速粒子对复杂流动的响应研究——Ⅱ典型流场中粒子跟随性的数值分析[J].水科学进展,2003,14(1):28-35. |
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| 作者姓名： | 黄社华 魏庆鼎 |
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| 作者单位： | 1.武汉大学水利水电学院, 教育部水沙科学重点实, 验室, 湖北, 武汉, 430072; |
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| 基金项目： | 湖北省武汉市青年科技晨光计划，中国博士后科学基金 |
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| 摘 要： | 以修正后适用于高颗粒雷诺数的粒子非恒定运动方程为基础,将该方程无量纲化,定义了一般流场中粒子跟随性的概念,给出了粒子跟随性的数学表述。据此对典型流场中粒子的运动进行了数值计算,并定量分析了粒径、密度等参数对不同流动中示踪粒子跟随特性的影响。
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| 关 键 词： | 粒子跟随性 瞬变运动方程 数值计算 |
| 收稿时间： | 2002-01-21 |
On velocity response of tracing particles in laser-based velocimetry to complex flows, 2,numerical analysis of sliding velocity of tracing particles in various flows |
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| HUANG She-hua,WEI Qing-ding.On velocity response of tracing particles in laser-based velocimetry to complex flows, 2,numerical analysis of sliding velocity of tracing particles in various flows[J].Advances in Water Science,2003,14(1):28-35. |
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| Authors: | HUANG She-hua WEI Qing-ding |
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| Affiliation: | 1.Hydroelectric Engineering College, Key Laboratory of Water and Sediment Science, Wuhan University, Wuhan 430072, China;2.State Key Laboratory for Turbulence Research, Peking University, Beijing 100871, China |
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| Abstract: | Application of the laser-based velocimetry to experimental researches of flows is closely involved in tracking ability of particles whose density or initial velocity is different from that of fluid.Based on the non-dimensional particle transient motion equation for high particle Reynolds number, a concept of velocity of small particles in response to arbitrary flows are pre sented and described mathematically.In various typical flows, the particle's transient motions are investigated numerically, and the effects of several parameters, such as particle diameter and density, on particle's velocity in responses to flows are analyzed quantitatively. |
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| Keywords: | tracking ability of particles transient motion numerical simulation |
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