Saltation in wind blown sand  

作　　者：朱久江 匡震邦 邹学勇 刘玉章 

出　　处：《Science China Mathematics》1998年第6期629-637,共9页中国科学：数学（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (GrantNos.4 930 10 0 2 ;196 72 0 2 2 ) .

摘　　要：The Boltzmann equation of the sand particle velocity distribution function in wind-blown sand two-phase flow is established based on the motion equation of single particle in air. And then, the generalized balance law of particle property in single phase granular flow is extended to gas-particle two-phase flow. The velocity distribution function of panicle phase is expanded into an infinite series by means of Grad’s method and the Gauss distribution is used to replace Maxwell distribution. In the case of truncation at the third-order terms, a closed third-order moment dynamical equation system is constructed. The theory is further simplified according to the measurement results obtained by stroboscopic photography in wind tunnel tests.The Boltzmann equation of the sand particle velocity distribution function in wind blown sand two\|phase flow is established based on the motion equation of single particle in air. And then, the generalized balance law of particle property in single phase granular flow is extended to gas particle two\|phase flow. The velocity distribution function of particle phase is expanded into an infinite series by means of Grad’s method and the Gauss distribution is used to replace Maxwell distribution. In the case of truncation at the third\|order terms, a closed third\|order moment dynamical equation system is constructed. The theory is further simplified according to the measurement results obtained by stroboscopic photography in wind tunnel tests.

关 键 词：sallation blown sand turbulent boundary flow 

分 类 号：P425.55[天文地球—大气科学及气象学]