Resources

Author(s): Zheng-Gang Cai, Jun-Hua Pan, and Ming-Jiu Ni Focusing on the evolution of wake structure in a flow around an impulsively stopped sphere in an incompressible viscous fluid with a streamwise magnetic field, a complicated vortex structure system containing a primary vortex ring, a fragmented secondary vortex, and an accompanying vortex is discussed, summarized in the {N, Re} phase diagram. The scaling laws of drag coefficient and peak...

Author(s): You-sheng Zhang, Wei-dan Ni, Yu-cang Ruan, and Han-song Xie [Phys. Rev. Fluids 7, 129901] Published Wed Dec 07, 2022

Author(s): Liang Hao, Decai Kong, Yue Wu, Taotao Liu, and Guoyu Wang Experiments are performed on gas entrainment and leakage mechanisms of various ventilated cavity flow patterns around a conical axisymmetric body. As the ventilation rate increases, the size of shedding foam grows while the shedding frequency reduces, leading to balanced gas injection and leakage. The mechanism controlling cavity hysteresis is quantitatively explained using a...

Author(s): Nicolas Chastrette, Michaël Baudoin, Philippe Brunet, Laurent Royon, and Régis Wunenburger Surface acoustic waves (SAWs) are used in droplet microfluidics for operations on sessile droplets, such as internal mixing, directional motion, or nebulization. An unsolved problem has been to understand how high frequency (MegaHz) SAWs can counterintuitively cause low frequency (10-500 Hz) oscillations on the drop free surface, which is known...

Author(s): Amanda A. Howard, Martin R. Maxey, and Stany Gallier We present a simple extension of the suspension balance model (SBM) for viscous Stokes flow that allows for modeling of suspensions of particles of bidisperse size. In this work, we show a range of simulations to justify the assumptions made in the polydisperse suspension balance model. The aim is to study the effects of moderate size variation on the rheology of the suspension. ...

Author(s): Nayeon Park and Jaewook Nam We present an analysis of pulsatile shear-thinning flows in two-dimensional channels. Characteristic viscosity is determined based on steady-state analysis of non-Newtonian flows and is used to non-dimensionalize the flow system by introducing the non-Newtonian Womersley number. Numerical analyses on various Carreau fluids reveal the existence of master curves related to the amplitude and phase lag of the...

Author(s): A. Chahine, J. Sebilleau, R. Mathis, and D. Legendre We conduct an experimental investigation of droplet sliding under the influence of a laminar or turbulent airflow for water and glycerin droplets. The onset of sliding is described with a critical Weber number that depends on the Reynolds number through the drag coefficient. During sliding, various shapes (oval, corner, and rivulet) are observed, and transitions are predicted using...