Please wait a minute...
img

Wechat

Adv search
JOURNAL OF DESERT RESEARCH  2011, Vol. 31 Issue (3): 583-587    DOI:
国家重点基础研究发展规划     
Numerical Computation of Nonuniform Grains Saltation
FAN Li, WU Sheng-zhi
Key Laboratory of the Ministry of Education for Mechanics on Disaster and Environment in Western China; School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China
Download:  PDF (1471KB) 
Export:  BibTeX | EndNote (RIS)      
Abstract  Most of aeolian physics researches focus on field observation of wind blown sand and numerical simulation for saltation of sand grains with the uniform diameter size. Therefore, the numerical study for nonuniform sand grains seems very necessary. In this paper, computational method is employed to simulate saltation movement of sand grains with various diameters. We analyzed the saltation movement of sand particles with seven different particle size distributions respectively. The results show that the air flow has more powerful transporting ability for nonuniform particles than that for uniform particles at the same wind velocity when the average grain diameters are identical. Meanwhile, when saltation movement comes to steady state there exist different saltation heights and lengths including related saturated saltation layer thicknesses for different particle size distributions.
Key words:  nonuniform sand grain      particle size distribution      mass flux     
Received:  01 December 2010      Published:  20 May 2011
ZTFLH:  X169  
Articles by authors
FAN Li
WU Sheng-zhi

Cite this article: 

FAN Li;WU Sheng-zhi. Numerical Computation of Nonuniform Grains Saltation. JOURNAL OF DESERT RESEARCH, 2011, 31(3): 583-587.

URL: 

http://www.desert.ac.cn/EN/     OR     http://www.desert.ac.cn/EN/Y2011/V31/I3/583

[1]丁国栋.风沙物理学中两个焦点问题研究现状与未来研究思路刍议[J].中国沙漠,2008,28(3):395-398.
[2]董玉祥,马骏.输沙量对海岸沙丘表面风沙流中不同粒径沙粒垂向分布的影响[J].中山大学学报(自然科学版),2009,48(3):102-107.
[3]冯大军,倪晋仁,李振山.风沙流中不同粒径组沙粒的输沙量垂向分布实验研究[J].地理学报,2007,62(11):1194-1203.
[4]亢力强,郭烈锦.风沙跃移中颗粒与多粒径床面碰撞的数值模拟[J].工程热物理学报,2006,27(1):82-84.
[5]Zheng X J,Bo T L,Zhu W.A scale-coupled method for simulation of the formation and evolution of aeolian dune field[J].International Journal of Nonlinear Science and Numerical Simulation,2009,10(3):387-395.
[6]杨具瑞,方铎,毕慈芬,等.非均匀风沙起动规律研究[J].中国沙漠,2004,24(2):248-251.
[7]Oertel H. Prandtl’s essentials of fluid mechanics[M].New York:Springer Verlag Press,2004:334-337.
[8]Ungar J E,Haff P K.Steady state saltation in air[J].Sedimentology,1987,34:289-299.
[9]何丽红,郑晓静.风一沙一电多场耦合模型及其对风沙流结构的影响[J].兰州大学学报(自然科学版),2005,41(4):87-92.
[10]Zheng X J,Huang N,Zhou Y.The effect of electrostatic force on the evolution of sand saltation cloud[J].The European Physical Journal E,2006,19(4):129-138.
[11]张树,张赞远,吕志勇.风沙运动中MAGNUS效应的数值研究[J].中国沙漠,2010,30(3):498-504.
[12]武建军,孙焕青,何丽红.沙粒起动风速的影响因素研究[J].中国沙漠,2010,30(4):743-748.
[13]Huang N,Zhang Y L,Robert D A.A model of the trajectories and midair collision probabilities of sand particles in a steady state saltation cloud[J].Journal of Geophysical Research,2007,112:D08206,doi:10.1029/2006JD007480.
[14]罗万银,董治宝,钱广强.PIV技术及其在风沙边界层研究中的应用[J].中国沙漠,2007,27(5):733-737.

No Suggested Reading articles found!