Results 11 to 20 of about 774,157 (293)
Low-Reynolds number swimming in gels [PDF]
EPL (Europhysics Letters), 2010 Many microorganisms swim through gels, materials with nonzero zero-frequency elastic shear modulus, such as mucus. Biological gels are typically heterogeneous, containing both a structural scaffold (network) and a fluid solvent.
Happel J. +8 more
core +2 more sources
Passive swimming in low Reynolds number flows [PDF]
Physical Review E, 2010 The possibility of microscopic swimming by extraction of energy from an external flow is discussed, focusing on the migration of a simple trimer across a linear shear flow.
J. Happel, Piero Olla
core +5 more sources
The European Physical Journal E, 2023 Lift forces are widespread in hydrodynamics. These are typically observed for big and fast objects, and are often associated with a combination of fluid inertia (i.e. large Reynolds numbers) and specific symmetry-breaking mechanisms. In contrast, the properties of viscosity-dominated (i.e.
Bureau, Lionel +2 more
openaire +5 more sources
Low-Reynolds-number swimming at pycnoclines. [PDF]
Proc Natl Acad Sci U S A, 2012 Microorganisms play pivotal functions in the trophic dynamics and biogeochemistry of aquatic ecosystems. Their concentrations and activities often peak at localized hotspots, an important example of which are pycnoclines, where water density increases sharply with depth due to gradients in temperature or salinity.
Doostmohammadi A +2 more
europepmc +5 more sources
Stochastic low Reynolds number swimmers [PDF]
Journal of Physics: Condensed Matter, 2009 As technological advances allow us to fabricate smaller autonomous self-propelled devices, it is clear that at some point directed propulsion could not come from pre-specified deterministic periodic deformation of the swimmer's body and we need to develop strategies to extract a net directed motion from a series of random transitions in the ...
Golestanian, R. ; https://orcid.org/0000-0002-3149-4002 +1 more
openaire +5 more sources
Optimal Swimming at Low Reynolds Numbers [PDF]
Physical Review Letters, 2004 Efficient swimming at low Reynolds numbers is a major concern of microbots. To compare the efficiencies of different swimmers we introduce the notion of ``swimming drag coefficient'' which allows for the ranking of swimmers. We find the optimal swimmer within a certain class of two dimensional swimmers using conformal mappings techniques.
Avron, J. E., Gat, O., Kenneth, O.
openaire +3 more sources
Valveless Pumping at Low Reynolds Numbers
Physical Review Applied, 2023 Pumping at low Reynolds number is a ubiquitously encountered feature, both in biological organisms and engineered devices. Generating net flow requires the presence of an asymmetry in the system, which traditionally comes from geometric flow rectifiers.
Gabriel Amselem +2 more
openaire +2 more sources
Scattering of low-Reynolds-number swimmers [PDF]
Physical Review E, 2008 We describe the consequences of time reversal invariance of the Stokes' equations for the hydrodynamic scattering of two low Reynolds number swimmers. For swimmers that are related to each other by a time reversal transformation this leads to the striking result that the angle between the two swimmers is preserved by the scattering.
Alexander, G, Pooley, C, Yeomans, J
openaire +4 more sources
Acoustic mixing at low Reynold’s numbers [PDF]
Applied Physics Letters, 2006 In microfluidic devices, hydrodynamic flow is usually governed by very low Reynold’s numbers. Under these conditions, only laminar flow is possible. Hence, mixing in microfluidics occurs by diffusion only. Interaction of small fluid volumes and acoustic waves in a solid leads to pronounced streaming effects in the fluid inducing mixing and stirring ...
Sritharan, K. +4 more
openaire +1 more source
A circle swimmer at low Reynolds number [PDF]
The European Physical Journal E, 2012 9 pages, 9 ...
Ledesma-Aguilar, R +2 more
openaire +3 more sources