Results 71 to 80 of about 10,703,008 (376)
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
Effect of geometry and Reynolds number on the turbulent separated flow behind a bulge in a channel [PDF]
Journal of Fluid Mechanics, 2015 Turbulent flow separation induced by a protuberance on one of the walls of an otherwise planar channel is investigated using direct numerical simulations.
J. Mollicone +3 more
semanticscholar +1 more source
Multifunctional Fluidic Units for Emergent, Responsive Robotic Behaviors
Advanced Materials, EarlyView.A multifunctional reconfigurable fluidic unit can be used as sensor, valve and actuator is presented. A unique configuration combines the features of the three components as a Responsive self‐oscillating actuator. The remarkable versatility of the fluidic unit is demonstrated by building different robots with the same fluidic units only by varying ...
Mostafa Mousa +3 more
wiley +1 more source
On the Relaxation of Turbulence at High Reynolds Numbers
, 2014 Turbulent motions in a fluid relax at a certain rate once stirring has stopped. The role of the most basic parameter in fluid mechanics, the Reynolds number, in setting the relaxation rate is not generally known.
Bewley, Gregory P. +2 more
core +1 more source
Rotation of a spheroid in a simple shear at small Reynolds number [PDF]
, 2015 We derive an effective equation of motion for the orientational dynamics of a neutrally buoyant spheroid suspended in a simple shear flow, valid for arbitrary particle aspect ratios and to linear order in the shear Reynolds number.
J. Einarsson +4 more
semanticscholar +1 more source
Advanced Materials, EarlyView.This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau +9 more
wiley +1 more source
Estudo do amortecimento do pêndulo simples: uma proposta para aplicação em laboratório de ensino
Revista Brasileira de Ensino de FísicaOs pêndulos são muito empregados nas atividades de ensino de cursos introdutórios de física. Nessas atividades, frequentemente, faz-se uso de modelos ideais para estudar o comportamento do pêndulo.
Francisco José Arnold +4 more
doaj +1 more source
Nanomaterials, 2020 Empirical correlations have been developed to relate experimentally determined starch nanoparticle size obtained in a solvent–antisolvent precipitation process with key hydrodynamic parameters of a spinning disc reactor (SDR).
Sahr Sana +2 more
doaj +1 more source
Magnetized Ekman Layer and Stewartson Layer in a Magnetized Taylor-Couette Flow
, 2008 In this paper we present axisymmetric nonlinear simulations of magnetized Ekman and Stewartson layers in a magnetized Taylor-Couette flow with a centrifugally stable angular-momemtum profile and with a magnetic Reynolds number below the threshold of ...
A. S. Gupta +9 more
core +1 more source
Is the Kelvin Theorem Valid for High-Reynolds-Number Turbulence? [PDF]
, 2006 The Kelvin-Helmholtz theorem on conservation of circulations is supposed to hold for ideal inviscid fluids and is believed to be play a crucial role in turbulent phenomena, such as production of dissipation by vortex line-stretching.
Chen, Shiyi +3 more
core +2 more sources