I will present our recent theoretical works on how hydrodynamics can induce the collective dynamics ofactive matter systems. (1) Both active nematics(microtubule-motor system) and bacteria suspensions can exhibit turbulent behaviours, but with different scaling in theenergy spectra. We construct an analytical model to understand such scaling behaviours in the two systems, where we reach good agreements between the analytic calculation and the experimental measurements. (2) Cilia can coordinate with each other by hydrodynamic interactions, beating in the form of a metachronal wave.With the dynamic model, we deal with the coordinateddynamics of a cilia array which contains an infinite number of model cilia. With the theory, we can provide the dispersion relation and predict the stable wave patterns in the model cilia arrays, which may guide future fabrications of model cilia for applications.
Prof. Meng Fanlong is a research member at the Institute of Theoretical Physics, Chinese Academy of Sciences. In 2010, he graduated from the Department of Modern Physics, University of Science and Technology of China, and in 2015, he graduated from the Institute of Theoretical Physics, Chinese Academy of Sciences. From 2015 to 2016, he conducted postdoctoral research at the University of Cambridge. From 2016 to 2018, he conducted postdoctoral research at Oxford University, and from 2018 to 2019, he worked as a Humboldt scholar and postdoctoral researcher at the Max-Planck Institute of Dynamics and Self-Organization. In December 2019, Fanlong joined the Institute of Theoretical Physics of the Chinese Academy of Sciences as an Associate Professor. Currently, he is mainly engaged in theoretical research on soft matter, active matter and biophysics, including dynamics theory of active matter, rheological properties of polymer systems, liquid-liquid phase separation theory, and etc.
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