38 citations · 143 across the 13 of their papers we have counts for
13 papers
Turbulence Decay Intensifies Clustering of Bubbles and Particles
Dante L. Naylor, Zhiyu Yang, Lei Yi +3
Our understanding of inertial particle dynamics in turbulence is mostly based on flows held in a statistically stationary state, a particular regime that differs from many natural…
Hydrodynamic Brachistochrone: Conflicting Paths of Time and Energy Minima within Viscous Media
Ramin Gasimli, Lei Yi, Shrabin Bajracharya +2
We experimentally and theoretically study the hydrodynamic analog of the classical brachistochrone problem: the {\it time-} and {\it energy-minimizing} paths for a spherical partic…
Non-reciprocal coalescence-breakup dynamics in concentrated emulsions
Ivan Girotto, Andrea Scagliarini, Lei Yi +3
Dense stabilized emulsions are mixtures of immiscible fluids where the high-volume fraction droplet dispersed phase is stabilized against coalescence by steric interactions. The pr…
Experimental study of velocity statistics in wall-bounded turbulent emulsions
Yaning Fan, Yi-Bao Zhang, Jinghong Su +3
Turbulent emulsions are ubiquitous in chemical engineering, food processing, pharmaceuticals, and other fields. However, our experimental understanding of this area remains limited…
How interfacial tension enhances drag in turbulent Taylor-Couette flow with neutrally buoyant and equally viscous droplets
Jinghong Su, Yi-bao Zhang, Cheng Wang +5
The presence of dispersed-phase droplets can result in a notable increase in the system's drag. However, our understanding of the mechanism underlying this phenomenon remains limit…
Divergence of critical fluctuations on approaching catastrophic phase inversion in turbulent emulsions
Lei Yi, Ivan Girotto, Federico Toschi +1
Catastrophic phase inversion, the sudden breakdown of a dense emulsion, occurs when the dispersed majority phase irreversibly exchanges role with the continuous minority phase. Thi…
Numerical study on the mechanism of drag modulation by dispersed drops in two-phase Taylor-Couette turbulence
Jinghong Su, Lei Yi, Bidan Zhao +4
The presence of a dispersed phase can significantly modulate the drag in turbulent systems. We derived a conserved quantity that characterizes the radial transport of azimuthal mom…
Turbulence drag modulation by dispersed droplets in Taylor-Couette flow: the effects of the dispersed phase viscosity
Cheng Wang, Lei Yi, Linfeng Jiang +1
The dispersed phase in turbulence can vary from almost inviscid fluid to highly viscous fluid. By changing the viscosity of the dispersed droplet phase, we experimentally investiga…
Recent developments of turbulent emulsions in Taylor-Couette flow
Lei Yi, Cheng Wang, Sander G. Huisman +1
Emulsions are common in many natural and industrial settings. Recently, much attention has been put on understanding the dynamics of turbulent emulsions. This paper reviews some re…
Physical mechanisms for droplet size and effective viscosity asymmetries in turbulent emulsions
Lei Yi, Cheng Wang, Thomas van Vuren +4
By varying the oil volume fraction, the microscopic droplet size and the macroscopic rheology of emulsions are investigated in a Taylor-Couette (TC) turbulent shear flow. Although…
How do the finite-size particles modify the drag in Taylor-Couette turbulent flow
Cheng Wang, Lei Yi, Linfeng Jiang +1
We experimentally investigate the drag modification by neutrally buoyant finite-size particles with various aspect ratios in a Taylor-Couette (TC) turbulent flow. The current Reyno…
Water entry of spheres into a rotating liquid
Lei Yi, Shuai Li, Hechuan Jiang +3
The transient cavity dynamics during water entry of a heavy, non-rotating sphere impacting a rotating pool of liquid is studied experimentally, numerically, and theoretically. We s…
Global and local statistics in turbulent emulsions
Lei Yi, Federico Toschi, Chao Sun
Turbulent emulsions are complex physical systems characterized by a strong and dynamical coupling between small-scale droplets and large-scale rheology. By using a specifically des…