Push and pull: attractors and repellors of a dynamical system can localize inertial particles

Metcalfe, Guy

doi:10.1007/s10035-019-0949-8

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…They really stand at the crossroad of fundamental physics, [1][2][3] astrophysics, 4,5 chemistry, 6 biology, 7,8 materials science, 9 and thermal and mechanical engineering. [10][11][12] Related problems include (but are not limited to) fluid-dynamic instabilities in complex fluids, [13][14][15] the interaction of an immiscible phase with a turbulent flow, [16][17][18][19] particle ordering in laminar convection, [20][21][22][23][24][25][26][27][28][29][30][31][32][33] and the fascinating prospect of using some of these phenomena to produce "active" matter, i.e., parts or components that can recognize and bind to each other and form well-defined networks or systems. 5,9 Other intriguing directions of research originate from the possibility to interpret theoretically all these behaviors as they were the manifestation in the physical space of complex non-linear dynamics governed by overarching "attractors" in the phase space ("attractee").…”

Section: Introductionmentioning

confidence: 99%

Characterization of two-way coupled thermovibrationally driven particle attractee

Lappa

2022

Physics of Fluids

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Following the recent identification of a new category of thermovibrationally-driven particle attractors in dilute fluid-particle systems (Phys. Fluids, 26(9), 093301, 2014; Phys. Fluids, 31(7), 073303, 2019; Phys. Fluids, 32(5), 053314, 2020), some effort is provided to develop an integrated framework able to encompass earlier discoveries and account for new effects in a single treatment. In particular, we examine the alterations ('corrugation') that can be induced in the geometrically perfect particle structures pertaining to this class of phenomena as the percentage of dispersed solid mass is progressively increased. The related dynamics are explored within the framework of a two-way coupled model with respect to several parameters (solid mass load, density ratio, frequency and amplitude of the imposed vibrations). Ensuing results are interpreted by separating instantaneous and time-averaged contributions and using some ideas borrowed from the companion theory of bifurcations. We show that the back influence of particles on the carrier flow can lead to a variety of possible paths of evolution. While in some cases the original attractee can be overshadowed by particle-induced turbulence, in other circumstances new aggregates with heretofore unseen morphology show up.

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