报告内容摘要

Turbulent °ows laden with inertial particles are ubiquitous in nature (e.g. aerosols in clouds, and dust storms on Earth and Mars) and in industrial applications (e.g. liquid fuel and pulverized coal sprays in combustion chambers). Experimental and numerical studies of these °ows are quite challenging due to the wide spectra of length- and time- scales of the dispersed particles in addition to the spectra of scales intrinsic to the carrier °uid turbulence. The two-way and and four-way nonlinear interactions between the dispersed particles and the turbulence result in complex multi-scale physical phenomena.

The lecture focuses on the physical mechanisms of interactions between dispersed spherical particles and isotropic as well as homogeneous shear turbulence using Direct Numerical Simula-tion (DNS). Particles whose diameter is smaller than the Kolmogorov length scale are simulated as point particles. Larger particles with diameter of the order of Taylor microscale are fully resolved using the Immersed Boundary method.

报告人简介

S. Elghobashi 教授

Mechanical and Aerospace Engineering Department

University of California, Irvine

欢迎广大老师和学生参加！