TY - GEN
T1 - Study on microscopic mechanism for sand particles lift-off
AU - Jin, A. Fang
AU - Yang, Zhi Chun
AU - Geni, Mamtimin
PY - 2011
Y1 - 2011
N2 - Smoothed particle hydrodynamics (SPH) method is used to simulate the lift-off phenomenon of sand particles in the air flow. Whether the sand particles make any form of movement in the air flow, firstly, they always jump into the air from a standstill condition, so it is helpfull to understand the saltation mechanism of sand particles. Because the computitional region is discreted into particles in the SPH method, the movement of each particle can represent the machnical behavior of sand particles if the particle dispersion has the same characteristic with the sand particles. The foundmental theory of SPH method and its key elements are reviewed in detail, such as the kernel function, the choice of smoothing length and their influence on the numerical simulation results.In this study a numerical simulation model of wind-blown sand two-phase flow using SPH model is proposed and then the model is discreted to simulate the take-off process of sand particles with adquate boundary conditions. Simulation results show that the proposed model can be used to simulate the dynamic characteristics of sand particles in lift-off.
AB - Smoothed particle hydrodynamics (SPH) method is used to simulate the lift-off phenomenon of sand particles in the air flow. Whether the sand particles make any form of movement in the air flow, firstly, they always jump into the air from a standstill condition, so it is helpfull to understand the saltation mechanism of sand particles. Because the computitional region is discreted into particles in the SPH method, the movement of each particle can represent the machnical behavior of sand particles if the particle dispersion has the same characteristic with the sand particles. The foundmental theory of SPH method and its key elements are reviewed in detail, such as the kernel function, the choice of smoothing length and their influence on the numerical simulation results.In this study a numerical simulation model of wind-blown sand two-phase flow using SPH model is proposed and then the model is discreted to simulate the take-off process of sand particles with adquate boundary conditions. Simulation results show that the proposed model can be used to simulate the dynamic characteristics of sand particles in lift-off.
KW - Left-off velocity of sand particle
KW - Numerical simulation
KW - SPH method
UR - http://www.scopus.com/inward/record.url?scp=79952740629&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.211-212.1147
DO - 10.4028/www.scientific.net/AMR.211-212.1147
M3 - 会议稿件
AN - SCOPUS:79952740629
SN - 9783037850695
T3 - Advanced Materials Research
SP - 1147
EP - 1151
BT - Mechatronics and Intelligent Materials
T2 - 2011 International Conference on Mechatronics and Intelligent Materials, MIM 2011
Y2 - 21 May 2011 through 22 May 2011
ER -