Mechanical and Aerospace Engineering Department

University of California, Irvine

主持人：佘振苏 教授

时间：周二（6月17日）上午8:30

地点：工学院1号楼210会议室

 

 

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.

 

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