Numerical investigation on particle deposition in a chamber with an attached-wall heat source
Numerical investigation on particle deposition in a chamber with an attached-wall heat source
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DOI：
10.1177/1420326x13484773
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发表时间：
2014-08
影响因子：
3.6
通讯作者：
Xi Chen;Angui Li;Ran Gao
中科院分区：
文献类型：
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作者：
Xi Chen;Angui Li;Ran Gao
采用拉格朗日方法的随机游走模型，对附壁热源室中颗粒的沉积进行了数值研究。通过跟踪密度为1,400 kg m - 3的4,000个粒子来评估粒子轨迹。本文的目的是研究热源长度对颗粒（2.5µm - 10µm）沉积的影响以及热源上方附着壁面颗粒沉积的模式。数值结果表明，颗粒沉积率随热源长度的增加而增加，热源长度的增加可以加速颗粒在附着壁上的沉积。研究还发现，热源上方附着壁面上的颗粒沉积数是沉积位置和颗粒大小的函数。
The deposition of particles in a chamber with an attached-wall heat source is investigated numerically by the random walk model of Lagrangian method. The particle trajectories are evaluated by tracking 4,000 particles with a density of 1,400 kg m−3. The purpose of the present paper is to study the effect of the heat source length on the deposition of particles (2.5 µm–10 µm) and the particle deposition pattern on the attached-wall surface above the heat source. Numerical results show that the particle deposition fraction increases with the heat source length and the increase of the heat source length can accelerate particle deposition onto the attached wall. It is also found that the particle deposition number on the attached-wall surface above the heat source is a function of the deposit position and the particle size.