﻿ 栅栏阻沙机理的数值模拟研究 Numerical Simulation Research of Sand-Arresting Mechanism of Upright Fence

Vol.07 No.03(2017), Article ID:21036,7 pages
10.12677/AG.2017.73041

Numerical Simulation Research of Sand-Arresting Mechanism of Upright Fence

Zhiqiang Wang, Baofeng Fu, Jian Zhao, Yifeng He

Northwest Institute of Nuclear Technology, Xi′an Shaanxi

Received: May 29th, 2017; accepted: Jun. 17th, 2017; published: Jun. 20th, 2017

ABSTRACT

Numerical simulation of flow field and sand saltation trajectory around the upright fence with η = 0 and η = 40% was performed with Eulerian-Lagrangian model, and the sand-arresting mecha- nism of upright fence was analyzed. The results show that, for well anti sand performance of upright fence, it is necessary to achieve the wind velocity decrement and ensuring that the sand saltation trajectory locate in low wind speed region. Numerical simulation research is beneficial complementarity for traditional experiment study, and is helpful to reveal the sand-arresting mechanism of upright fence.

Keywords:Sand Hazard Control, Block Sand Barriers, Numerical Simulation, Sand-Arresting Mechanism

1. 引言

2. 研究方法

2.1. 数学模型

1) 气相连续方程和动量方程分别为：

(1)

(2)

2) 湍流模型采用标准双方程模型进行描述：

(3)

(4)

(5)

3) 颗粒运动方程：

(6)

(7)

2.2. 计算问题描述

Figure 1. Schematic diagram of fence

Table 1. Sand grain ejection velocity

3. 结果与分析

3.1. 阻沙栅栏结构与风场特征

3.2. 沙粒流经阻沙措施时的运动轨迹

Figure 2. The wind field characteristics around the fence ((a) The distribution of wind speed, (b) The vectors of wind speed)

Figure 3. Tracks and velocity of different diameter around the fence with η = 0 under different wind velocity (m∙s−1)

Figure 4. Tracks and velocity of different diameter around the fence with η = 40% under different wind velocity (m∙s−1)

4. 讨论

5. 结论

Numerical Simulation Research of Sand-Arresting Mechanism of Upright Fence[J]. 地球科学前沿, 2017, 07(03): 376-382. http://dx.doi.org/10.12677/AG.2017.73041

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