Bacteria are native inhabitants and efficient swimmers of the microscopic world. Interesting collective dynamics emerges in systems of interacting motile bacteria and a few examples will be discussed in this talk. First, I will show bacteria confined in micro-structures can collectively generate transport flow and function as a microscopic pump. Then, I will focus on collective phenomena of free-swimming bacteria and discuss how bacteria form active clusters and develop turbulence-like flow pattern at zero Reynolds number.
Hepeng Zhang received his college degree from Fundan University in 2000. Then he was enrolled in the Physics Ph.D. program at City University of New York and got his degree in 2004. From 2004 to 2010, he carried out research as a postdoc in the Center for Nonlinear Dynamics in University of Texas at Austin. In 2010, he joined the faculty of Shanghai Jiao Tong University.