Results 121 to 130 of about 42,197 (166)

Transport in oscillatory flows

2008
We examine the degree to which the transport of a passive scalar contaminant is enhanced by an oscillatory cellular flow. The enhancement is found to depend on the Peclet number Pe and on the ratio η of the oscillation frequency to the shear rate.
W. J. Merryfield, E. Knobloch
openaire   +1 more source

Transient and Oscillatory Granular Shear Flow

Physical Review Letters, 2004
The forces and particle motion during transient and oscillatory shear of granular material are investigated experimentally. In a shear cell of Taylor-Couette-type we find that how a granular shear flow starts depends strongly on the prior shear direction.
Masahiro, Toiya, Justin, Stambaugh, Wolfgang, Losert   +2 more
openaire   +2 more sources

The Stability of Oscillatory Hagen-Poiseuille Flow

Journal of Applied Mechanics, 1986
The linear stability theory of the nonzero mean, sinusoidally oscillating flow in a tube of circular cross section is examined. It is found that the relevant axisymmetric disturbances in the oscillatory flow are more stable (i.e., have larger decay rates) than the axisymmetric disturbances of the mean flow alone.
Tozzi, J. T., von Kerczek, C. H.
openaire   +2 more sources

Oscillatory Magnetogasdynamics Slip Flow in a Microchannel

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
The problem of pressure-driven magnetogasdynamic (MGD) slip flow with small rarefaction through a long microchannel is considered. The flow is driven by a steady or oscillatory pressure gradient. The study of MGD flows in microchannels is of interest since they occur in many electromagnetic microscale devices. In obtaining the microfluidic solutions in
Ramesh K. Agarwal, L. Chusak
openaire   +1 more source

The inception of sheet flow in oscillatory flow

Ocean Engineering, 1998
Abstract A simple model is developed to study the inception of sheet flow in oscillatory flow based on the available experimental data. The inception of sheet flow in oscillatory flow is well defined by the simple model: A / d = KA 2 ω / ν + B , where A is the semi-excursion of wave orbital motion near the bed, d is the grain size, ω is the ...
openaire   +1 more source

Oscillatory flow of a fourth‐order fluid

International Journal for Numerical Methods in Fluids, 2008
AbstractThis study deals with the incompressible flow of a fourth‐order fluid over a porous plate oscillating in its own plane. Numerical solution of the nonlinear problem governing the flow is given. The influence of various parameters of interest on the velocity distribution is shown and discussed with the help of several graphs.
Hayat, T., Shahzad, F., Ayub, M.
openaire   +1 more source

Reconfiguration of elastic blades in oscillatory flow

Journal of Fluid Mechanics, 2018
When subjected to a steady cross-flow, the deformation of flexible blades is known to result in the alleviation of the internal stresses in comparison to rigid structures. In the field of biomechanics, the flow-induced deformations of flexible structures leading to stress reduction have been often referred to as ‘reconfiguration’ in order to highlight ...
Tristan Leclercq, Emmanuel de Langre
openaire   +1 more source

Concentration effects in oscillatory blood flow

Biorheology, 1969
A continuum model of fluid suspensions is applied to the problem of unsteady tube flow of a fluid in which deformations of suspended particles are negligible. An expression is obtained for the volumetric flow rate as a function of suspension concentration.
K A, Kline, S J, Allen
openaire   +2 more sources

Oscillatory flow of blood in a stenosed artery

Bulletin of Mathematical Biology, 1987
The flow of blood in a cylindrical rigid artery, the wall of which contains a stenosis of small cosine shaped amplitude is considered. The blood is assumed to be a Newtonian fluid with velocity and pressure that have axial symmetry and are independent of the axial coordinate.
openaire   +3 more sources

Interaction of spheres in oscillatory fluid flows

Physical Review E, 2007
Rigid spherical particles in oscillating fluid flows form interesting structures as a result of fluid mediated interactions. Here we show that spheres under horizontal vibration align themselves at right angles to the oscillation and sit with a gap between them. The details of this behavior have been investigated through experiments and simulations. We
D, Klotsa, Michael R, Swift, R M, Bowley, P J, King   +3 more
openaire   +2 more sources