2022 6th International Conference on Mechanics, Mathematics and Applied Physics (ICMMAP 2022)
Prof. Jianzhong Lin, Ningbo University | Zhejiang University, China

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Jianzhong Lin, Ph.D., doctoral supervisor, distinguished professor of Zhejiang University, studied under Peiyuan Zhou, academician of Chinese Academy of Sciences. He is an expert in fluid mechanics, a winner of The National Science Fund for Distinguished Young Scholars, a winner of the National Millions of Talents Project, a winner of the special government allowance of the State Council, a vice chairman of chinese society for measurement, a member of the general expert group of the national key research and development program "Research and application of common technologies based on national quality", a director of chinese society of theoretical and applied mechanics, a "cross-century outstanding talent" of the Ministry of Education, and a special expert of Zhejiang Province. Zhejiang Province's "New Century 151 Talent Project" is the key funded training object, the editor-in-chief of Mechanics and Practice, and the editors of 10 international academic journals such as Applied Sciences and Journal of Mechanics. He used to be the vice chairman of chinese society for measurement, the executive director of chinese society of theoretical and applied mechanics, the director of China Aerodynamics Society, the vice chairman of chinese society of theoretical and applied mechanics Fluid Mechanics Professional Committee, the chairman of Zhejiang Mechanics Society, the president and dean of China Metrology University, the president of Hangzhou Institute of Applied Engineering Technology, the dean of Zhejiang University of Science and Technology, and an adjunct professor of China University of Science and Technology. He presided over more than 40 scientific research projects such as National Outstanding Youth Fund, National Natural Science Foundation key projects, general programs and national key projects, and obtained more than 20 authorized patents, published 8 books, and cultivated them. Research fields: multiphase flow, fiber suspension flow, microfluidics, turbulence, coherent structures and fluid mechanics, etc. (more)


Research Areas: 

① Multiphase Flow

② Fiber Suspension

③ Microfluidics
④ Turbulence and Coherent Structure
⑤ Fluid Machinery


Speech Title: 

Hydrodynamic behavior of two-phase flow with self-driven particles


Abstract: 

In this paper, the Lattice Boltzmann-immersed boundary method is used to simulate the hydrodynamic behavior of two-phase flow with self-driven particles. It is found that the velocity distribution induced by the self-propelled particle deviates from Maxwell distribution, and its velocity strongly depends on the location of singularities. For the hydrodynamic interaction between a self-rotation rotator and passive particles in a two dimensional confined cavity, the passive particle gradually departs from the rotator although its relative displacement to the rotator exhibits a periodic oscillation. The relative distance between the two particles and the rotator’s rotational frequency are responsible for the oscillation amplitude and frequency. For the system of three particles, the passive particle’s velocities exhibit a superposition of a large amplitude oscillation and a small amplitude oscillation at the lower Re, and the large amplitude oscillation will disappear at the higher Re. For the Squirmer swimming in power-law fluid, it is found that the swimming speed and efficiency of Squirmer with different swimming modes are affected by Re and power-law index in varying extent. For the hydrodynamic properties of Squirmer swimming in power-law fluid near a wall, four new swimming behaviors are found for the first time, and the causes of these swimming behaviors are analyzed. It is found that only increasing Re can change the swimming behavior of the Squirmer. The reason is that the increase of Re weakens the attraction of the wall. For the hydrodynamic interaction between a pair of Squirmers in power-law fluid, it is found that the collision process of a pair of Pullers is significantly different from that of a pair of Pushers. Parallel swimming Pushers attract each other while the Pullers first repel each other and finally turn into a "head-to-head" contact state. A pair of pushers moving in opposite directions is very easy to "lock" in a certain position, while a pair of Pullers always departs from each other after collision. With the increase of power index, the degree of difficulty of Squirmer's rotation increases synchronously in the process of interaction.