摘要
目的采用欧拉-欧拉方法研究不同粒径沙尘颗粒起动规律。方法采用数值模拟的研究方法。结果在雷诺数为1.7×105时,分别计算了1.00,0.50,0.08 mm 3个粒径的沙粒起动过程。数值模拟的结果能够模拟出沙尘颗粒的3种运动过程,和实验现象吻合。结论对于粒径为1.00 mm和0.08 mm的颗粒来说,颗粒的起动总是首先发生在风速突变的地方;粒径越小的颗粒起动越快,即更容易发生起动过程。
Aim To adopt Eulerian-Eulerian model to study the process of particles starting.Methods Numerical simulation is introduced.Results The starting processes of three kinds of particle′s diameter are simulated,and obtained moving styles of the particles at Re=1.7×105.The starting of particle will occur first at the place where the wind velocity changes suddenly in the case of dp=1 mm and dp=0.08 mm.The smaller the particle is,the easier and faster it starts.Conclusion Numerical computation could simulate three moving styles of sand particles and accord well to the experiment.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第1期57-60,65,共5页
Journal of Northwest University（Natural Science Edition）
基金
国家重点基础研究发展规划基金资助项目(G1999022210)
关键词
颗粒
起动
数值模拟
particle
start
numerical simulation
