Langevin approach to generate synthetic turbulent flows
Open Access
- 1 April 1997
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 9 (4) , 1078-1084
- https://doi.org/10.1063/1.869201
Abstract
We present an analytical scheme, easily implemented numerically, to generate synthetic Gaussian turbulent flows by using a linear Langevin equation, where the noise term acts as a stochastic stirring force. The characteristic parameters of the velocity field are well introduced, in particular the kinematic viscosity and the spectrum of energy. As an application, the diffusion of a passive scalar is studied for two different energy spectra. Numerical results are compared favorably with analytical calculations.Keywords
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This publication has 21 references indexed in Scilit:
- Eddy diffusivities in scalar transportPhysics of Fluids, 1995
- Measured Local-Velocity Fluctuations in Turbulent ConvectionPhysical Review Letters, 1995
- Diffusion of passive scalars under stochastic convectionPhysics of Fluids, 1994
- Stochastic generation of homogeneous isotropic turbulence with well-defined spectraPhysical Review E, 1993
- Effective diffusion in a stochastic velocity fieldJournal of Statistical Physics, 1993
- Generation of spatiotemporal colored noisePhysical Review A, 1992
- On the convection of a passive scalar by a turbulent Gaussian velocity fieldJournal of Statistical Physics, 1991
- Transport effects associated with turbulence with particular attention to the influence of helicityReports on Progress in Physics, 1983
- Diffusion by a Random Velocity FieldPhysics of Fluids, 1970
- Analytical theory of turbulent diffusionJournal of Fluid Mechanics, 1961