Simulations of a randomly advected passive scalar field

Simulations of a randomly advected passive scalar field

The advection of a passive scalar field by a rapidly decorrelating random velocity field with power-law scaling is computed by simulations in a cyclic square at resolutions of 4096 2 and 8192 2 grid points. Structure functions of the scalar field are measured and inertial-range scaling exponents are...

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Veröffentlicht in:Physics of Fluids (1994) 1998-11, Vol.10 (11), p.2867-2884
Hauptverfasser: Chen, Shiyi, Kraichnan, Robert H.
Format: Artikel
Sprache:eng
Schlagworte:
ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
FLUID FLOW
RANDOMNESS
SCALAR FIELDS
SCALING
SIMULATION
STRUCTURE FUNCTIONS
TURBULENCE
VELOCITY
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Beschreibung
Zusammenfassung:The advection of a passive scalar field by a rapidly decorrelating random velocity field with power-law scaling is computed by simulations in a cyclic square at resolutions of 4096 2 and 8192 2 grid points. Structure functions of the scalar field are measured and inertial-range scaling exponents are determined. The conditional mean of the scalar-field dissipation term and its moments are found. The results are compared with theoretical predictions and with other recent simulations.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.869808