摘要
固液两相流的动理学理论认为固体颗粒相可用Boltzmann方程描述。从流场中的颗粒受力分析出发 ,应用动理学的 Chapman- Enskog法 ,探讨了低浓度固液两相流下的 Boltzmann方程的二阶近似解和颗粒相本构关系。结果表明 ,尽管颗粒所受相间力与两相脉动速度有关 ,但在两相脉动速度近乎无关的极限条件下 ,颗粒速度分布函数和颗粒相本构关系与快速颗粒流的相同。
The kinetic theory for solid/liquid two phase flows assumes that the particle phase can be described by the Boltzmann equation. A force analysis of a particle in a turbulent two phase flow was used to develop a second order approximate solution to the Boltzmann equation and the constitutive relationships for the particle phase by analogy with the kinetic theory for gases. Though the force on a particle exerted by the liquid depends on the fluctuating velocities of both phases, both the particle velocity distribution function and the constitutive relationships have the same form as those for rapid granular flows in the inertial limit of particle motion, in which the particle behavior is dominated by the mean liquid velocity and the mutual collisions among particles. This limit can be approximately realized in dilute solid/liquid two phase flows with heavy coarse particles.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第4期560-560,共1页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金委和水利部联合资助重大项目( 5 9890 2 0 0)
