Work

Striped patterns in radially driven suspensions with open boundaries

Year: 2021

Type: article

Abstract: We study the motion of radially driven fluid–immersed particles in a novel Hele–Shaw cell with open boundaries. The initially uniform suspension forms a striped pattern within a specific range of horizontal oscillation frequencies and for sufficiently large amplitudes. We observe that the initial coarsening dynamics of the stripes gradually slows down and the pattern reaches a steady state after a few minutes. The distance between the stripes in the steady state exhibits an exponentially saturating increase with increased oscillation amplitude or frequency. The width of the stripes decreases as a power-law with the frequency, while its amplitude dependence follows a logistic function. We propose a mechanism—based on the interplay between shear stress, hydrodynamic interactions, and frictional forces—to link the structural characteristics of the stripes to the properties of the oscillatory external drive.

Source: Physics of Fluids

DOI: 10.1063/5.0065801

Authors: Mahdieh Mohammadi, Maniya Maleki, Adam Wysocki, M. Reza Shaebani

Institutions: Institute for Advanced Studies in Basic Sciences, Otto-von-Guericke-Universität Magdeburg, Saarland University

Language: English

Topic: Rheology and Fluid Dynamics Studies

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Deutsche Forschungsgemeinschaft

Award: G3430464636