Intermittency in two-dimensional Ekman-Navier-Stokes turbulence

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

Volumn 66, Issue 2, 2002, Pages

  Boffetta, G ^a,b   Celani, A ^c   Musacchio, S ^a,b   Vergassola, M ^d  

^a UNIVERSITY OF TURIN   (Italy)

^b SEZIONE DI TORINO   (Italy)

^c INSTITUT NON LINÉAIRE DE NICE   (France)

^d UNIVERSITÉ CÔTE D'AZUR   (France)

Author keywords

[No Author keywords available]

Indexed keywords

FRICTION; INCOMPRESSIBLE FLOW; LYAPUNOV METHODS; NAVIER STOKES EQUATIONS; PROBABILITY DENSITY FUNCTION; STATISTICAL METHODS; TURBULENCE; VISCOSITY; VORTEX FLOW;

CORRELATION LENGTH; NONLINEAR DEPENDENCE; VORTICITY; WAVE NUMBER;

FLUID DYNAMICS;

EID: 41349105244     PISSN: 1063651X     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevE.66.026304     Document Type: Article

References (13)

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4. The numerical integration of Eq. (1) starting from a zero field is performed by a fully dealiased pseudospectral code with a second-order Runge-Kutta scheme, on a doubly periodic square domain of size (Formula presented) at different resolutions: (Formula presented) grid points. A small viscosity (depending on the resolution: (Formula presented) for (Formula presented) (Formula presented) for (Formula presented) and (Formula presented) for (Formula presented) is used to remove the remnant enstrophy flux at small scales. The large-scale forcing (Formula presented) is Gaussian, (Formula presented) correlated in time, and limited to a shell of wave numbers around (Formula presented) (Formula presented) for (Formula presented), and (Formula presented) for (Formula presented). Forcing amplitude is chosen to provide an enstrophy injection rate (Formula presented). At variance with other choices for (Formula presented) commonly used (e.g., large-scale shear), this kind of forcing ensures the statistical isotropy and homogeneity of the vorticity field.
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