Direct numerical simulation on strained turbulent flows and particles within

We present results from direct numerical simulations of strained turbulent flows. Our focus is twofold. One is to improve our understanding of the interactions of large and small scale dynamics in strained turbulent flow; another focus is to understand the influence of the straining on the motions o...

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Bibliographic Details
Published in:Journal of physics. Conference series 2011-12, Vol.318 (5), p.052003-10
Main Authors: Gylfason, Ármann, Lee, Chung-min, Perlekar, Prasad, Toschi, Federico
Format: Article
Language:English
Subjects:
Acceleration
Algorithms
Computational fluid dynamics
Computer simulation
Direct numerical simulation
Flow simulation
Fluid dynamics
Fluid flow
Physics
Small scale
Statistics
Stokes number
Strain rate
Turbulence
Turbulent flow
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Summary:We present results from direct numerical simulations of strained turbulent flows. Our focus is twofold. One is to improve our understanding of the interactions of large and small scale dynamics in strained turbulent flow; another focus is to understand the influence of the straining on the motions of passive and inertial particles of varied Stokes numbers. We seek to emphasize the effects of the strain geometry and strain rate on the particles' behaviors. Eulerian flow field results and the Lagrangian particle velocity and acceleration statistics will be discussed. The Rogallo algorithm is applied for simulating the flow field in a non-cubical domain.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/318/5/052003