Results 271 to 280 of about 7,809,143 (340)

Computing the velocity of a rotating flow

Parallel Computing, 1998
Abstract To compute the time-dependent flow of a rotating incompressible fluid we consider the velocity–vorticity formulation of the Navier–Stokes equations in cylindrical coordinates. In the numerical method employed the velocity field at each time-step is found as the least squares solution of an overdetermined system of linear equations, Ax=b.
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Slip velocity and velocity inversion in a cylindrical Couette flow

Physical Review E, 2009
Velocity inversion in a nanoscale cylindrical Couette flow is investigated with the Navier-Stokes (NS) equation and molecular-dynamics (MD) simulation. With general slip boundary conditions in the NS equation, the flow can be classified into five distinct profiles. The condition of velocity inversion is explored in the whole space of four dimensionless
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Flow Velocities in Pipelines

Journal of Hydraulic Engineering, 1983
Most of the equations that have been developed for relating velocity of a stream in a partly filled pipe to the slope and size of the stream use hydraulic radius (R) as the parameter for size. The equations using this parameter are poor representations of flow behavior when comparing different relative depths of flow, as Camp pointed out for the case ...
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Flow Velocity

Abstract This chapter reviews basic concepts in fluid dynamics that are useful to the practice of anesthesiology. Laminar flow occurs when fluids flow in an orderly fashion without mixing. Turbulent flow involves mixing within the fluid and creates additional resistance to flow. The Reynolds number equation describes factors that promote
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Tsunami Flow Velocity

2013
G. Chock, I. Robertson, D. Kriebel, M. Francis, I. Nistor   +4 more
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Selection of velocity profile and flow depth in granular flows

Physical Review E, 2001
The dynamics of a two-dimensional pile constituted by spherical grains organized in parallel layers is investigated theoretically. Only three effects are taken into account in the model: driving by gravity, nonlocal dissipation due to shocks, and trapping of grains by the bumps of the underneath layer. This is sufficient to recover the basic properties
B, Andreotti, S, Douady
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Velocity field for Taylor–Couette flow with an axial flow

Physics of Fluids, 1999
The flow in the gap between an inner rotating cylinder concentric with an outer stationary cylinder with an imposed pressure-driven axial flow was studied experimentally using particle image velocimetry (PIV) in a meridional plane of the annulus. The radius ratio was η=0.83 and the aspect ratio was Γ=47.
Wereley, Steven T., Lueptow, Richard M.
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Velocity of energy flow

American Journal of Physics, 1978
We point out and discuss a frequently misunderstood, overlooked, or disregarded relationship between the energy-momentum tensor and the velocity of energy flow.
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Ice velocity and thickness of the world’s glaciers

Nature Geoscience, 2022
R. Millan, J. Mouginot, A. Rabatel, Mathieu Morlighem   +3 more
semanticscholar   +1 more source

Flow velocity measurements for pulsatile flow

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1988
The inherent sensitivity of magnetic resonance imaging to motion makes it particularly well-suited as a noninvasive flow measurement modality. A pulse sequence which labels moving material by subjecting it to a pulse that inverts the longitudinal magnetization is discussed.
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