Streamline Topology and Dilute Particle Dynamics in a Kármán Vortex Street Flow

Wu, Zuo-Bing

doi:10.1142/s0218127403007217

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The motion of particles exhibits abundant characteristics even if the background flows are very simple. Particles tend to concentrate asymptotically along periodic, quasi-periodic or chaotic trajectories for such flows as steady and unsteady cellular flows [3,4], periodic Stuart vortex flows [5], the von Kármán vortex street flows [6,7] and plane wake flows confined in a narrow channel (the JTZ model) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Generalization of the JTZ model to open plane wakes

2010

Chaos: An Interdisciplinary Journal of Nonlinear Science

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Section: Introductionmentioning

confidence: 99%

Generalization of the JTZ model to open plane wakes

2010

Chaos: An Interdisciplinary Journal of Nonlinear Science

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“…In particular, for a von Kármán vortex flow field, the suspended particle trajectories are determined as chaotic by calculating the maximal Lyapunov exponent [7]. A route of bifurcation process to a chaotic trajectory and more attractors in a bifurcation diagram related to particle parameters are reported [8].…”

Section: Introductionmentioning

confidence: 99%

Numerical study on heavy rigid particle motion in a plane wake flow by spectral element method

2008

Numerical Methods in Fluids

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SUMMARYExperimental particle dispersion patterns in a plane wake flow at a high Reynolds number have been predicted numerically by discrete vortex method (Phys. Fluids A 1992; 4:2244-2251; Int. J. Multiphase Flow 2000; 26:1583-1607). To address the particle motion at a moderate Reynolds number, spectral element method is employed to provide an instantaneous wake flow field for particle dynamics equations, which are solved to make a detail classification of the patterns in relation to the Stokes and Froude numbers. It is found that particle motion features only depend on the Stokes number at a high Froude number and depend on both numbers at a low Froude number. A ratio of the Stokes number to squared Froude number is introduced and threshold values of this parameter are evaluated that delineate the different regions of particle behavior. The parameter describes approximately the gravitational settling velocity divided by the characteristic velocity of wake flow. In order to present effects of particle density but preserve rigid sphere, hollow sphere particle dynamics in the plane wake flow is investigated. The evolution of hollow particle motion patterns for the increase of equivalent particle density corresponds to that of solid particle motion patterns for the decrease of particle size. Although the thresholds change a little, the parameter can still make a good qualitative classification of particle motion patterns as the inner diameter changes.

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Streamline Topology and Dilute Particle Dynamics in a Kármán Vortex Street Flow

Cited by 2 publications

References 15 publications

Generalization of the JTZ model to open plane wakes

Generalization of the JTZ model to open plane wakes

Numerical study on heavy rigid particle motion in a plane wake flow by spectral element method

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