2020
DOI: 10.1017/jfm.2020.243
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Near-wall hydrodynamic slip triggers swimming state transition of micro-organisms

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Cited by 26 publications
(34 citation statements)
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“…This is markedly different from the near-wall motion of other swimmers with a priori prescribed surface slip (e.g. spherical squirmers), for which the strongest slip might not be localized around the most efficient region, thus leading to increase or decrease of their swimming velocities due to confinement [60]. It is also consistent with experiments wherein active drops have been observed to perform quasi-two-dimensional motion near a wall, while being pinned to it by gravity [61].…”
Section: Discussionmentioning
confidence: 62%
“…This is markedly different from the near-wall motion of other swimmers with a priori prescribed surface slip (e.g. spherical squirmers), for which the strongest slip might not be localized around the most efficient region, thus leading to increase or decrease of their swimming velocities due to confinement [60]. It is also consistent with experiments wherein active drops have been observed to perform quasi-two-dimensional motion near a wall, while being pinned to it by gravity [61].…”
Section: Discussionmentioning
confidence: 62%
“…The problem of steric collision has been circumvented by employing an electrostatic-type, short-ranged repulsive force at the plane wall (Spagnolie & Lauga 2012): The parameters have typical values 200, 100, respectively, so that the swimmer does not approach closer than 0.01 times the swimmer radius. Such a scenario was previously encountered by others in relation to ‘squirmers’ (Spagnolie & Lauga 2012; Li & Ardekani 2014; Poddar, Bandopadhyay & Chakraborty 2020), as well as self-diffusiophoretic microswimmers (Ibrahim & Liverpool 2016), and different forms of repulsive potentials were employed. It is noteworthy that the squirmer models only deal with the hydrodynamics of the microswimmer, and the wall-induced distortion of the scalar field (e.g.…”
Section: Resultsmentioning
confidence: 99%
“…2016; Poddar et al. 2020, 2021), simulations were performed for a wide range of initial configurations, and the swimming trajectories were categorized based on their observed long-term behaviours. This procedure would take a significant computational time, amplified by the fine resolution of different parameters required to uncover any non-trivial motion characteristics.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, the velocity components are given in an associated cylindrical coordinate system . In view of using those general solutions, we define a bispherical coordinate system and relate it to the cylindrical coordinates by (Happel & Brenner 1983) A corresponding diagrammatic depiction can be found in Poddar, Bandopadhyay & Chakraborty (2020). In this bispherical system, and denote the plane wall and the particle surface, respectively.…”
Section: Problem Formulationmentioning
confidence: 99%