Mathematical modelling and numerical computations for fluid problems arising from industry and engineering

The motion of liquid jets and droplets are fundamental phenomena in many industrial applications such as fiber spinning and inkjet printing. In this talk, I will first discuss the stretching a viscous thread subject to non-isothermal effects. The minimum stretching force to get pinch-off for the thread is determined and the effects of non-isothermal condition are examined.  Secondly, the stability of two-phase viscoelastic liquid jets is analyzed. It shows that the presence of the outer fluid produces more secondary droplets in the well-known beads-on-a-string structure. Finally, if time allows, I will also talk about the numerical methods for solving Poisson-Nernst-Planck system and related models.

Prof. Dongdong He received his B.S. degree in Mathematics from Hefei University of Technology in 2006. He then did three years’ graduate study at Fudan University. And he received the PhD degree in Applied Mathematics from York University in 2012. From August 2012 to November 2013, he was a postdoctoral fellow at Department of Mathematics, City University of Hong Kong. From September 2013 to October 2017, he worked at School of Aerospace Engineering and Applied Mechanics, Tongji University as an Assistant Professor (September 2013-December 2016) and  the Associate Professor (December 2016-October 2017). Prof. He joined the school of science and engineering, the Chinese University of Hong Kong, Shenzhen as an Assistant Professor in November 2017.

Prof. He’s research interests include Mathematical Modelling and Scientific Computing, Fluid Mechanics, Computational Fluid Dynamics, Numerical Methods for Partial Differential Equations. He has published more than 30 journal papers, including: Journal of Fluid Mechanics、 Journal of Computational Physics、Computer Methods in Applied Mechanics and Engineering, etc.