Events

Dr Haibo Huang, Lattice Boltzmann study on spheroidal particles suspension and sedimentation in fluid flows

Date: Monday 22 July 2013 11:00 - 12:00

Location: SEMS Seminar Room (Third Floor Engineering)

Lattice Boltzmann study on spheroidal particles suspension and sedimentation in fluid flows

Dr Haibo Huang
Dept. Modern Mechanics
University of Science and Technology of China
Hefei, China

Spheroidal particles suspension and sedimentation in fluid flows draw much attention from academia and industry. In this work a lattice Boltzmann method (LBM) is developed to study these flows. Three aspects of relevant research are carried on. First, the energy dissipation about spheroidal particle suspension at low-Reynolds (Re)-numbers Couette flows is investigated to test that whether Jeffery’s hypothesis (Jeffery 1922) is correct. (‘The particle will tend to adopt that motion which, of all the motions possible under the approximated equations, corresponds to the least dissipation of energy’). At Re about 1, our results invalidate the hypothesis. Second, the translation and rotational modes of sedimentation at low Re inside both circular and square tubes are obtained. An interesting anomalous rolling mode is found in the square tubes. It is also found that near a transitional regime, in terms of average value, a lighter ellipsoid may settle faster than a heavier one. Third, two sphere particles’ behaviors when they settle down are also investigated. Several typical translation modes are obtained. The study may shed light on our understanding in Rheology or mechanism of particle-fluid flows.

Biography：
Haibo Huang is an Associate Professor of the Dept. Modern Mechanics at University of Science and Technology of China (USTC). He obtained his Ph.D. in Mechanic Engineering from National University of Singapore and his Bachelor’s degree from USTC. He carried out his Post-doc research at Florida International University about oil-water flows in porous media. He has authored and co-authored 9 papers published in reputable journals including Journal of Fluid Mech., Phys. Fluids, and Phys. Rev. E, among others. In 2010-2011, He also carried out two-phase lattice Boltzmann study at Technische Univ., Braunschweig, Germany, as an Alexander von Humboldt Research Fellow. His research is supported by National Natural Science Foundation of China, Ministry of Education, China (a program for New Century Excellent Talents in University). His current research is focused on lattice Boltzmann method, two-phase flows, and particle-fluid interaction. He can be reached at huanghb@ustc.edu.cn.