Journal of Fluid Mechanics, ISSN 0022-1120, 06/2015, Volume 772, pp. 678 - 704

Since the pioneering work of Richardson in 1926, later refined by Batchelor and Obukhov in 1950, it is predicted that the rate of separation of pairs of fluid...

turbulent flows | mixing | MECHANICS | DIFFUSION | PHYSICS, FLUIDS & PLASMAS | 2-PARTICLE DISPERSION | Phenomenology | Fluid mechanics | Turbulence

turbulent flows | mixing | MECHANICS | DIFFUSION | PHYSICS, FLUIDS & PLASMAS | 2-PARTICLE DISPERSION | Phenomenology | Fluid mechanics | Turbulence

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 2018, Volume 843, pp. 872 - 897

The motion of tracer particles is kinematically simulated around three elementary flow patterns; a Burgers vortex, a shear-layer structure with coincident...

topological fluid dynamics | turbulent mixing | turbulence theory | INTENSE VORTICITY | MECHANICS | PHYSICS, FLUIDS & PLASMAS | TURBULENCE | DIFFUSION | NUMERICAL SIMULATIONS | 2-PARTICLE DISPERSION | MOTIONS | Shear | Turbulent flow | Fluid flow | Oscillations | Direction | Compressive properties | Vorticity | Structures | Turbulence | Statistical analysis | Computational fluid dynamics | Reynolds number | Fluid | Topology | Orientation | Statistics | Dispersion | Tracer particles | Strain | Analogies | Vortices | Flow velocity | Scaling | Tetrads | Tracers | Lines

topological fluid dynamics | turbulent mixing | turbulence theory | INTENSE VORTICITY | MECHANICS | PHYSICS, FLUIDS & PLASMAS | TURBULENCE | DIFFUSION | NUMERICAL SIMULATIONS | 2-PARTICLE DISPERSION | MOTIONS | Shear | Turbulent flow | Fluid flow | Oscillations | Direction | Compressive properties | Vorticity | Structures | Turbulence | Statistical analysis | Computational fluid dynamics | Reynolds number | Fluid | Topology | Orientation | Statistics | Dispersion | Tracer particles | Strain | Analogies | Vortices | Flow velocity | Scaling | Tetrads | Tracers | Lines

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 2/2010, Volume 645, pp. 497 - 528

The relative dispersion of pairs of inertial point particles in incompressible, homogeneous and isotropic three-dimensional turbulence is studied by means of...

VELOCITY | ACCELERATION STATISTICS | MECHANICS | AEROSOL | MOTION | HEAVY-PARTICLES | PHYSICS, FLUIDS & PLASMAS | INTERMITTENT DISTRIBUTION | DIFFUSION | PREFERENTIAL CONCENTRATION | 2-PARTICLE DISPERSION | COLLISION RATES | Fluid mechanics | Flow velocity | Turbulent flow | Reynolds number | Turbulence | Separation | Stokes number | Computational fluid dynamics | Fluid flow | Dispersions | Inertial

VELOCITY | ACCELERATION STATISTICS | MECHANICS | AEROSOL | MOTION | HEAVY-PARTICLES | PHYSICS, FLUIDS & PLASMAS | INTERMITTENT DISTRIBUTION | DIFFUSION | PREFERENTIAL CONCENTRATION | 2-PARTICLE DISPERSION | COLLISION RATES | Fluid mechanics | Flow velocity | Turbulent flow | Reynolds number | Turbulence | Separation | Stokes number | Computational fluid dynamics | Fluid flow | Dispersions | Inertial

Journal Article

Physical Review Letters, ISSN 0031-9007, 06/2018, Volume 120, Issue 24, p. 244502

We present a generalization of turbulent pair dispersion to large initial separations (eta < r(0) < L), by introducing a new time scale, tau(v0), that reflects...

PHYSICS, MULTIDISCIPLINARY | 2-PARTICLE DISPERSION | DIFFUSION | Physics - Fluid Dynamics

PHYSICS, MULTIDISCIPLINARY | 2-PARTICLE DISPERSION | DIFFUSION | Physics - Fluid Dynamics

Journal Article

Astrophysical Journal Letters, ISSN 2041-8205, 11/2012, Volume 759, Issue 1, pp. L17 - 4

Observations of solar granulation obtained with the New Solar Telescope of Big Bear Solar Observatory are used to study the turbulent pair dispersion of...

Turbulence | Sun: photosphere | Sun: surface magnetism | STATISTICS | ISOTROPIC TURBULENCE | turbulence | SOLAR PHOTOSPHERE | ANOMALOUS DIFFUSION | 2-DIMENSIONAL TURBULENCE | ASTRONOMY & ASTROPHYSICS | RELATIVE DIFFUSION | PARTICLE PAIRS | SURFACE | MAGNETIC ELEMENTS | 2-PARTICLE DISPERSION | Separation | Solar granulation | Fluid dynamics | Asymptotic properties | Space telescopes | Dispersions | Solar observatories | MAGNETIC FIELDS | TELESCOPES | PLAGES | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | SOLAR GRANULATION | PHOTOSPHERE | TURBULENCE | BRIGHTNESS | SUN | ASYMPTOTIC SOLUTIONS

Turbulence | Sun: photosphere | Sun: surface magnetism | STATISTICS | ISOTROPIC TURBULENCE | turbulence | SOLAR PHOTOSPHERE | ANOMALOUS DIFFUSION | 2-DIMENSIONAL TURBULENCE | ASTRONOMY & ASTROPHYSICS | RELATIVE DIFFUSION | PARTICLE PAIRS | SURFACE | MAGNETIC ELEMENTS | 2-PARTICLE DISPERSION | Separation | Solar granulation | Fluid dynamics | Asymptotic properties | Space telescopes | Dispersions | Solar observatories | MAGNETIC FIELDS | TELESCOPES | PLAGES | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | SOLAR GRANULATION | PHOTOSPHERE | TURBULENCE | BRIGHTNESS | SUN | ASYMPTOTIC SOLUTIONS

Journal Article

Physics of Fluids, ISSN 1070-6631, 05/2013, Volume 25, Issue 5, p. 55101

We have extended the "well-mixed" two-particle stochastic models for 3D Gaussian turbulence to n particles, and have performed calculations for clusters of n...

RELATIVE DISPERSION | MECHANICS | PARTICLES | STATISTICS | PHYSICS, FLUIDS & PLASMAS | HOMOGENEOUS STATIONARY TURBULENCE | CONCENTRATION FLUCTUATIONS | DIFFUSION | FLOWS | 2-PARTICLE DISPERSION | PASSIVE SCALAR | PAIR | Correlation | Turbulence | Turbulent flow | Computational fluid dynamics | Fluid flow | Clusters | Mathematical models | Gaussian | Mechanics | Physics | ENGINEERING

RELATIVE DISPERSION | MECHANICS | PARTICLES | STATISTICS | PHYSICS, FLUIDS & PLASMAS | HOMOGENEOUS STATIONARY TURBULENCE | CONCENTRATION FLUCTUATIONS | DIFFUSION | FLOWS | 2-PARTICLE DISPERSION | PASSIVE SCALAR | PAIR | Correlation | Turbulence | Turbulent flow | Computational fluid dynamics | Fluid flow | Clusters | Mathematical models | Gaussian | Mechanics | Physics | ENGINEERING

Journal Article

Physica A: Statistical Mechanics and its Applications, ISSN 0378-4371, 2009, Volume 388, Issue 8, pp. 1375 - 1387

Lagrangian stochastic models are recognized as being powerful tools for pollutant dispersion at different scales in complex terrain and at different stability...

Stochastic model | Turbulence | Dispersion | STOCHASTIC-MODEL | FIELDS | PHYSICS, MULTIDISCIPLINARY | CONCENTRATION FLUCTUATIONS | CLOSURE | PLUME | SIMULATION | 2-PARTICLE DISPERSION | Nitrogen oxide | Environmental aspects | Micropollutants | Analysis | Topographical drawing

Stochastic model | Turbulence | Dispersion | STOCHASTIC-MODEL | FIELDS | PHYSICS, MULTIDISCIPLINARY | CONCENTRATION FLUCTUATIONS | CLOSURE | PLUME | SIMULATION | 2-PARTICLE DISPERSION | Nitrogen oxide | Environmental aspects | Micropollutants | Analysis | Topographical drawing

Journal Article

Acta Mechanica, ISSN 0001-5970, 9/2017, Volume 228, Issue 9, pp. 3203 - 3222

The single-, two- and multi-particle dispersions in isotropic turbulent flows are investigated using the direct numerical simulation (DNS), filtered DNS (FDNS)...

Engineering | Vibration, Dynamical Systems, Control | Classical and Continuum Physics | Engineering Thermodynamics, Heat and Mass Transfer | Theoretical and Applied Mechanics | Continuum Mechanics and Mechanics of Materials | Structural Mechanics | STOCHASTIC-MODEL | INERTIAL PARTICLES | VELOCITY | MECHANICS | MOTION | HOMOGENEOUS TURBULENCE | SPACE-TIME CORRELATIONS | STATISTICS | RELATIVE DIFFUSION | 2-PARTICLE DISPERSION | PAIRS | Models | Numerical analysis | Analysis | Methods | Turbulence | Turbulent flow | Filtration | Direct numerical simulation | Computational fluid dynamics | Fluid dynamics | Reynolds number | Fluid flow | Atoms & subatomic particles | Similarity theory | Dispersions | Velocity | Eddy viscosity | Large eddy simulation | Simulation | Vortices | Mathematical models

Engineering | Vibration, Dynamical Systems, Control | Classical and Continuum Physics | Engineering Thermodynamics, Heat and Mass Transfer | Theoretical and Applied Mechanics | Continuum Mechanics and Mechanics of Materials | Structural Mechanics | STOCHASTIC-MODEL | INERTIAL PARTICLES | VELOCITY | MECHANICS | MOTION | HOMOGENEOUS TURBULENCE | SPACE-TIME CORRELATIONS | STATISTICS | RELATIVE DIFFUSION | 2-PARTICLE DISPERSION | PAIRS | Models | Numerical analysis | Analysis | Methods | Turbulence | Turbulent flow | Filtration | Direct numerical simulation | Computational fluid dynamics | Fluid dynamics | Reynolds number | Fluid flow | Atoms & subatomic particles | Similarity theory | Dispersions | Velocity | Eddy viscosity | Large eddy simulation | Simulation | Vortices | Mathematical models

Journal Article

Physics of Fluids, ISSN 1070-6631, 2012, Volume 24, Issue 7, pp. 073305 - 1/25

The rate at which two particles separate in turbulent flows is of central importance to predict the inhomogeneities of particle spatial distribution and to...

RELATIVE DISPERSION | flow simulation | VELOCITY | diffusion | HEAVY-PARTICLES | STATISTICS | PHYSICS, FLUIDS & PLASMAS | mixing | channel flow | SHEAR-FLOW | boundary layer turbulence | PREFERENTIAL CONCENTRATION | two-phase flow | flow separation | shear turbulence | MECHANICS | MODELS | disperse systems | fluctuations | INTERMITTENT DISTRIBUTION | numerical analysis | 2-PARTICLE DISPERSION | HOMOGENEOUS ISOTROPIC TURBULENCE | Turbulence | Shear | Separation | Turbulent flow | Computational fluid dynamics | Fluid flow | Dispersions | Inertial

RELATIVE DISPERSION | flow simulation | VELOCITY | diffusion | HEAVY-PARTICLES | STATISTICS | PHYSICS, FLUIDS & PLASMAS | mixing | channel flow | SHEAR-FLOW | boundary layer turbulence | PREFERENTIAL CONCENTRATION | two-phase flow | flow separation | shear turbulence | MECHANICS | MODELS | disperse systems | fluctuations | INTERMITTENT DISTRIBUTION | numerical analysis | 2-PARTICLE DISPERSION | HOMOGENEOUS ISOTROPIC TURBULENCE | Turbulence | Shear | Separation | Turbulent flow | Computational fluid dynamics | Fluid flow | Dispersions | Inertial

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 1/2007, Volume 571, pp. 391 - 417

The laws governing the spread of a cluster of particles in homogeneous isotropic turbulence are derived using a theoretical approach based on inertial subrange...

CONVECTIVE BOUNDARY-LAYER | MECHANICS | HOMOGENEOUS TURBULENCE | PHYSICS, FLUIDS & PLASMAS | 2-DIMENSIONAL TURBULENCE | REYNOLDS-NUMBER TURBULENCE | PARTICLE PAIRS | ISOTROPIC TURBULENCE | LARGE-EDDY SIMULATIONS | CONCENTRATION FLUCTUATIONS | KOLMOGOROV CONSTANT | 2-PARTICLE DISPERSION | Turbulence | Fluid dynamics | Simulation | Theory | Reynolds number

CONVECTIVE BOUNDARY-LAYER | MECHANICS | HOMOGENEOUS TURBULENCE | PHYSICS, FLUIDS & PLASMAS | 2-DIMENSIONAL TURBULENCE | REYNOLDS-NUMBER TURBULENCE | PARTICLE PAIRS | ISOTROPIC TURBULENCE | LARGE-EDDY SIMULATIONS | CONCENTRATION FLUCTUATIONS | KOLMOGOROV CONSTANT | 2-PARTICLE DISPERSION | Turbulence | Fluid dynamics | Simulation | Theory | Reynolds number

Journal Article

Physical Review Letters, ISSN 0031-9007, 2012, Volume 109, Issue 14, pp. 1 - 5

We present a numerical study of two-particle dispersion from point sources in three-dimensional incompressible homogeneous and isotropic turbulence at Reynolds...

Journal Article | FIELDS | DIFFUSION | PAIR DISPERSION | PHYSICS, MULTIDISCIPLINARY | STATISTICS | 2-PARTICLE DISPERSION

Journal Article | FIELDS | DIFFUSION | PAIR DISPERSION | PHYSICS, MULTIDISCIPLINARY | STATISTICS | 2-PARTICLE DISPERSION

Journal Article

Physics of Fluids, ISSN 1070-6631, 09/2005, Volume 17, Issue 9, pp. 095109 - 095109-9

We use Lagrangian stochastic models and direct numerical simulation for stationary isotropic turbulence to calculate backwards relative dispersion statistics,...

STOCHASTIC-MODEL | FIELDS | MECHANICS | HOMOGENEOUS TURBULENCE | PHYSICS, FLUIDS & PLASMAS | ALGORITHM | ISOTROPIC TURBULENCE | PARTICLE PAIRS | DIFFUSION | REYNOLDS-NUMBER DEPENDENCE | 2-PARTICLE DISPERSION | DIRECT NUMERICAL SIMULATIONS

STOCHASTIC-MODEL | FIELDS | MECHANICS | HOMOGENEOUS TURBULENCE | PHYSICS, FLUIDS & PLASMAS | ALGORITHM | ISOTROPIC TURBULENCE | PARTICLE PAIRS | DIFFUSION | REYNOLDS-NUMBER DEPENDENCE | 2-PARTICLE DISPERSION | DIRECT NUMERICAL SIMULATIONS

Journal Article

13.
Full Text
Comparison of backwards and forwards scalar relative dispersion in turbulent shear flow

International Journal of Heat and Mass Transfer, ISSN 0017-9310, 10/2012, Volume 55, Issue 21-22, pp. 5650 - 5664

Turbulent mixing is characteristically identifiable with backwards relative dispersion, where pairs of particles get transported to the mixing location....

Forwards and backwards relative dispersion | Turbulent dispersion | Lagrangian simulation methods | LOW-REYNOLDS-NUMBER | HEAT-TRANSFER | CHANNEL FLOW | PLANE COUETTE-FLOW | ISOTROPIC TURBULENCE | ENGINEERING, MECHANICAL | PASSIVE SCALAR | DIRECT NUMERICAL-SIMULATION | MECHANICS | THERMODYNAMICS | MOLECULAR DIFFUSIVITY | CONCENTRATION FLUCTUATIONS | 2-PARTICLE DISPERSION | Comparative analysis | Turbulence | Analysis | Turbulent flow | Fluid flow | Scalars | Mathematical models | Couette flow | Dispersions | Channels | Walls

Forwards and backwards relative dispersion | Turbulent dispersion | Lagrangian simulation methods | LOW-REYNOLDS-NUMBER | HEAT-TRANSFER | CHANNEL FLOW | PLANE COUETTE-FLOW | ISOTROPIC TURBULENCE | ENGINEERING, MECHANICAL | PASSIVE SCALAR | DIRECT NUMERICAL-SIMULATION | MECHANICS | THERMODYNAMICS | MOLECULAR DIFFUSIVITY | CONCENTRATION FLUCTUATIONS | 2-PARTICLE DISPERSION | Comparative analysis | Turbulence | Analysis | Turbulent flow | Fluid flow | Scalars | Mathematical models | Couette flow | Dispersions | Channels | Walls

Journal Article

PHYSICAL REVIEW LETTERS, ISSN 0031-9007, 03/2002, Volume 88, Issue 9, p. 094501

Relative dispersion in fully developed turbulence is investigated by means of direct numerical simulations. Lagrangian statistics is found to be compatible...

DIFFUSION | FLOWS | PAIR DISPERSION | PHYSICS, MULTIDISCIPLINARY | 2-PARTICLE DISPERSION | Physics - Chaotic Dynamics

DIFFUSION | FLOWS | PAIR DISPERSION | PHYSICS, MULTIDISCIPLINARY | 2-PARTICLE DISPERSION | Physics - Chaotic Dynamics

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 05/2019, Volume 867, pp. 877 - 905

We present an extension of Thomson's (J. Fluid Mech., vol. 210, 1990, pp. 113-153) two-particle Lagrangian stochastic model that is constructed to be...

turbulence modelling | turbulence theory | isotropic turbulence | MECHANICS | PHYSICS, FLUIDS & PLASMAS | TRAJECTORIES | 2-PARTICLE DISPERSION | LAGRANGIAN STOCHASTIC-MODELS | Turbulence | Separation | Turbulent flow | Computational fluid dynamics | Computer simulation | Fluid flow | Velocity distribution | Velocity | Dispersion | Skewness | Isotropic turbulence | Stochasticity | Stochastic models

turbulence modelling | turbulence theory | isotropic turbulence | MECHANICS | PHYSICS, FLUIDS & PLASMAS | TRAJECTORIES | 2-PARTICLE DISPERSION | LAGRANGIAN STOCHASTIC-MODELS | Turbulence | Separation | Turbulent flow | Computational fluid dynamics | Computer simulation | Fluid flow | Velocity distribution | Velocity | Dispersion | Skewness | Isotropic turbulence | Stochasticity | Stochastic models

Journal Article

Physics of Fluids, ISSN 1070-6631, 09/2002, Volume 14, Issue 9, pp. 3224 - 3232

We investigate Lagrangian relative dispersion in direct numerical simulation of two-dimensional inverse cascade turbulence. The analysis is performed by using...

MECHANICS | PAIR DISPERSION | PHYSICS, FLUIDS & PLASMAS | 2-DIMENSIONAL TURBULENCE | RELATIVE DIFFUSION | SIMULATION | 2-PARTICLE DISPERSION | FLOW

MECHANICS | PAIR DISPERSION | PHYSICS, FLUIDS & PLASMAS | 2-DIMENSIONAL TURBULENCE | RELATIVE DIFFUSION | SIMULATION | 2-PARTICLE DISPERSION | FLOW

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 06/2017, Volume 821, pp. 358 - 383

The statistical properties of turbulent fluids depend on how local the energy transfers among scales are, i.e. whether the energy transfer at some given scale...

Geostrophic turbulence | Mixing and dispersion | Geophysical and geological flows | geophysical and geological flows | INERTIAL RANGE | STATISTICS | PHYSICS, FLUIDS & PLASMAS | OCEAN | geostrophic turbulence | MECHANICS | PAIR DISPERSION | PASSIVE TRACERS | SURFACE | DIFFUSION | CONSTANT-LEVEL BALLOONS | FLOWS | 2-PARTICLE DISPERSION | mixing and dispersion | Turbulent flow | Fluid flow | Two dimensional models | Properties | Fluids | Energy | Dynamics | Kinematics | Eddies | Barotropic mode | Turbulence | Statistical analysis | Computational fluid dynamics | Probability theory | Fluid | Particulates | Two dimensional flow | Statistics | Dispersion | Simulation | Turbulence models | Vortices | Predictions | Models | Kinetics | Energy transfer | Self-similarity | Engineering Sciences

Geostrophic turbulence | Mixing and dispersion | Geophysical and geological flows | geophysical and geological flows | INERTIAL RANGE | STATISTICS | PHYSICS, FLUIDS & PLASMAS | OCEAN | geostrophic turbulence | MECHANICS | PAIR DISPERSION | PASSIVE TRACERS | SURFACE | DIFFUSION | CONSTANT-LEVEL BALLOONS | FLOWS | 2-PARTICLE DISPERSION | mixing and dispersion | Turbulent flow | Fluid flow | Two dimensional models | Properties | Fluids | Energy | Dynamics | Kinematics | Eddies | Barotropic mode | Turbulence | Statistical analysis | Computational fluid dynamics | Probability theory | Fluid | Particulates | Two dimensional flow | Statistics | Dispersion | Simulation | Turbulence models | Vortices | Predictions | Models | Kinetics | Energy transfer | Self-similarity | Engineering Sciences

Journal Article

Journal of Fluid Mechanics, ISSN 0022-1120, 10/2010, Volume 661, pp. 412 - 445

The relative dispersion of a scalar plume is examined experimentally. A passive fluorescent tracer is continuously released from a flush-bed mounted source...

turbulent boundary layers | turbulent mixing | mixing and dispersion | ATMOSPHERIC DIFFUSION | BED | PHYSICS, FLUIDS & PLASMAS | FLOW | STOCHASTIC-MODEL | MECHANICS | PARTICLE PAIRS | HIGH-REYNOLDS-NUMBER | PIV | 2-PARTICLE DISPERSION | Fluid mechanics | Flow velocity | Turbulent flow | Dispersion | Boundary layer | Turbulence | Computational fluid dynamics | Fluid flow | Mathematical models | Inertial | Diffusivity | Plumes

turbulent boundary layers | turbulent mixing | mixing and dispersion | ATMOSPHERIC DIFFUSION | BED | PHYSICS, FLUIDS & PLASMAS | FLOW | STOCHASTIC-MODEL | MECHANICS | PARTICLE PAIRS | HIGH-REYNOLDS-NUMBER | PIV | 2-PARTICLE DISPERSION | Fluid mechanics | Flow velocity | Turbulent flow | Dispersion | Boundary layer | Turbulence | Computational fluid dynamics | Fluid flow | Mathematical models | Inertial | Diffusivity | Plumes

Journal Article