5 papers · 1 filter
Two-way coupling in active suspensions suppresses particle accumulation and induces non-monotonic flow stabilization
Miyi Wu, Ziyue Yu, Lei Fang
We experimentally study the two-way coupling between a swarm of centimetre-scale active swimmers (Artemia salina) and an electromagnetically driven quasi-two-dimensional cellular f…
Turbulence at Low Reynolds Numbers
Ziyue Yu, Xinyu Si, Lei Fang
Turbulence -- ubiquitous in nature and engineering alike [1-5] -- is traditionally viewed as an intrinsically inertial phenomenon, emerging only when the Reynolds number (Re), whic…
Manipulating the direction of turbulent energy flux via tensor geometry in a two-dimensional flow
Xinyu Si, Filippo De Lillo, Guido Boffetta +1
In turbulent flows, energy flux refers to the transfer of kinetic energy across different scales of motion, a concept that is a cornerstone of turbulence theory. The direction of n…
Interaction between swarming active matter and flow: the impact on Lagrangian coherent structures
Xinyu Si, Lei Fang
In recent years, research topics concerning active matter have attracted interest from diverse communities. It has been suggested that active matter-as represented by zooplankton-h…
Biologically generated turbulent energy cascade in shear flow depends on tensor geometry
Xinyu Si, Lei Fang
It has been proposed that biologically generated turbulence plays an important role in material transport and ocean mixing. Both experimental and numerical studies have reported ev…