Results 221 to 230 of about 2,739 (265)

Vortex-dominated flow with viscous core structure

18th Fluid Dynamics and Plasmadynamics and Lasers Conference, 1985
Recent theoretical studies of vortex-dominated flows are reviewed with special emphasis on those for which the viscous core structures play an important role. The problems to be described are: The interaction and merging of two-dimensional vortices and of curved vortex filaments, the roll-up and decay of trailing far wakes, and the initiation of vortex
C. LIU, E. KRAUSE, L. TING
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Topological vortex dynamics in axisymmetric viscous flows

Journal of Fluid Mechanics, 1994
The topology of vortex lines and surfaces is examined in incompressible viscous axisymmetric flows with swirl. We argue that the evolving topology of the vorticity field must be examined in terms of axisymmetric vortex surfaces rather than lines, because only the surfaces enjoy structural stability.
Mogens V. Melander, Fazle Hussain
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Flow in a Viscous Vortex

Journal of Applied Physics, 1957
Equations have been derived for velocity, temperature, and pressure distribution in a two-dimensional compressible viscous vortex with a steady state component of radial flow. Radial velocity has been assumed small compared with the tangential component, and heat transfer has been neglected. The equations have been based upon the Navier-Stokes equation
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Three vortex motion in the slightly viscous flow

Science China Physics, Mechanics and Astronomy, 2010
The dynamics of three vortices moving in an ideal fluid in a plane can be expressed in Hamiltonian form. However, when viscosity can not be ignored, the system of point vortices has not this delicious structure. This investigation focuses on the viscosity effect on the motion of three vortices.
Hao Zhu, KeMing Cheng
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Flow in a Viscous Trailing Vortex

Aeronautical Quarterly, 1959
SummaryThe equations of motion for an isolated laminar viscous vortex at moderate to large Reynolds numbers are linearised, by assuming that both the rotational velocity and the deficit of longitudinal velocity are small compared with that in the free stream.
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Uniform Flow Past an Axially Uniform Viscous Vortex

Studies in Applied Mathematics, 1977
It is believed that the flow past a tornado causes the formation of smaller vortices which produce the “suction spots” observed along the path of destruction. Here we develop a greatly simplified mathematical model to investigate this phenomenon. An axially uniform vortex is developed by visualizing a circular tube with uniform surface suction of fluid
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Vortex Formations in Plane Flows of Viscous and Ideal Fluids

Fluid Dynamics, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Passive Particle Dynamics in Viscous Vortex Flow

2020
We focus on the description of point vortices both in inviscid and viscous environments and try to extend the idea of quantification of chaos in inviscid vortex systems of Babiano et al. [1] to viscous environments. In particular, we notice that viscosity can disrupt stable dynamics and cause initially stable trajectories to go through chaotic behavior,
Gil Marques, Maria João Rodrigues, Sílvio Gama   +2 more
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Simulation of Complex Inviscid and Viscous Vortex Flow

1993
A review of recent progress in numerical simulation of vortex-flow aerodynamics at the Institute for Design Aerodynamics of the DLR-Braunschweig is presented. The paper is devoted to the prediction of vortex lift including vortex breakdown, vortex-vortex interaction and shock-vortex interaction.
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Unsteady inviscid and viscous computations for vortex-dominated flows

Journal of Aircraft, 1990
The unsteady supersonic flow around a rigid sharp-edged delta wing is solved using the unsteady Euler and thin-layer Navier-Stokes equations. The problem is formulated relative to a moving frame of reference so that computation of the grid motion is not required.
Osama A. Kandil, H. Andrew Chuang
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