Results 11 to 20 of about 1,650 (161)
Novel Foraging Mechanisms in Atypical Excavate Flagellates. [PDF]
J Eukaryot MicrobiolABSTRACT Most excavates, a paraphyletic assemblage of flagellates, typically present an active vaned flagellum that drives a feeding current through a ventral groove for predation. However, some have “atypical” morphologies. Here, we describe the foraging mechanisms in heteroloboseid flagellates (Discoba) that have a groove but lack the seemingly ...
Suzuki-Tellier S +2 more
europepmc +2 more sources
Swimming by Spinning: Spinning-Top Type Rotations Regularize Sperm Swimming Into Persistently Progressive Paths in 3D. [PDF]
Adv Sci (Weinh)This article looks at how sperm swim forward even with uneven movements in their tail, using a virtual sperm model to show that their rotation helps keep them moving straight. It highlights that the way sperm rotate in 3D holds important clues about their tail beating, offering new insights into how cells move and how artificial swimmers could be ...
Ren X, Bloomfield-Gadêlha H.
europepmc +2 more sources
The Role of the Double-Layer Potential in Regularised Stokeslet Models of Self-Propulsion
Fluids, 2021 The method of regularised stokeslets is widely used to model microscale biological propulsion. The method is usually implemented with only the single-layer potential, the double-layer potential being neglected, despite this formulation often not being ...
David J. Smith +3 more
doaj +1 more source
Chemical Engineering Transactions, 2021 A generalized reflection method is proposed for determining the hydrodynamic resistance matrix of a rigid particle translating in a confined Stokesian fluid, by reducing its estimate to the solution of two simpler problems: (i) the singular expansion of ...
Giuseppe Procopio +2 more
doaj +1 more source
Fluids, 2022 Microorganisms often navigate a complex environment composed of a viscous fluid with suspended microstructures such as elastic polymers and filamentous networks.
Rudi Schuech, Ricardo Cortez, Lisa Fauci
doaj +1 more source
Effects of prey capture on the swimming and feeding performance of choanoflagellates
Flow, 2023 Locomoting organisms often carry loads such as captured prey or young. Load-carrying effects on high-Reynolds-number flight have been studied, but the fluid dynamics of load carrying by low-Reynolds-number microorganisms has not.
H. Nguyen +4 more
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LHB Hydroscience Journal, 2022 Les interactions hydrodynamiques induites par le confinement des particules colloïdales sont d’un intérêt de longue date. Cependant, les effets des géométries de confinement partiellement étendues ont reçu peu d’attention malgré leur applicabilité ...
Abdallah Daddi-Moussa-Ider
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Regularized Stokeslets Lines Suitable for Slender Bodies in Viscous Flow [PDF]
Fluids, 2021 Slender-body approximations have been successfully used to explain many phenomena in low-Reynolds number fluid mechanics. These approximations typically use a line of singularity solutions to represent flow. These singularities can be difficult to implement numerically because they diverge at their origin.
Zhao, Boan, Koens, Lyndon
openaire +4 more sources
Bitensorial formulation of the singularity method for Stokes flows
Mathematics in Engineering, 2023 This paper develops the bitensorial formulation of the system of singularities associated with unbounded and bounded Stokes flows. The motivation for this extension is that Stokesian singularities and hydrodynamic fundamental solutions are multi-point ...
Giuseppe Procopio, Massimiliano Giona
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Colloidal Active Matter Mimics the Behavior of Biological Microorganisms—An Overview
Small, Volume 19, Issue 13, March 29, 2023., 2023 Artificial active matter is heavily inspired by its biological counterparts. Even though motion mechanisms might differ, a series of behaviors is observed in both realms. This review gives an overview of recent developments, physical origins, and intriguing parallels between the biological world and man‐made micromachines.
Audrey Nsamela +3 more
wiley +1 more source