5 papers · 1 filter
Log-linear law of the mean streamwise velocity in turbulent boundary layers with moderate adverse pressure gradients
Fuzhou Lyu, Lihao Zhao, Weixi Huang +1
An essential feature of canonical zero-pressure-gradient (ZPG) turbulent boundary layers (TBLs) is that the mean streamwise velocity exhibits a logarithmic dependence on the wall-n…
Short term vs. long term: optimization of microswimmer navigation on different time horizons
Navid Mousavi, Jingran Qiu, Lihao Zhao +2
We use reinforcement learning to find strategies that allow microswimmers in turbulence to avoid regions of large strain. This question is motivated by the hypothesis that swimming…
Prolate spheroids settling in a quiescent fluid: clustering, microstructures and collisions
Xinyu Jiang, Chunxiao Xu, Lihao Zhao
In this study, we investigate the sedimentation of prolate spheroids in a quiescent fluid by means of the particle-resolved direct numerical simulation. With the increase of the pa…
Interactions between the near-wall turbulent structures and heavy particles in compressible turbulent boundary layers
Ming Yu, Lihao Zhao, Yibin Du +2
In the present study, we conduct direct numerical simulations to investigate the near-wall dynamics of compressible turbulent boundary layers at the free-stream Mach number of 6 la…
Efficient survival strategy for zooplankton in turbulence
Navid Mousavi, Jingran Qiu, Bernhard Mehlig +2
Zooplankton in a quiescent environment can detect predators by hydrodynamic sensing, triggering powerful escape responses. Since turbulent strain tends to mask the hydrodynamic sig…