Time evolution of the eddy viscosity in two-dimensional Navier-Stokes flow

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Chaves, M (Author) FCUP; Gama, S (Author) FCUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: PHYSICAL REVIEW E

Vol. 61

Pages: 2118-2120

ISSN: 2470-0045

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 8 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-001-0ZA

DOI: 10.1103/physreve.61.2118

Abstract (EN): The time evolution of the eddy viscosity associated with an unforced two-dimensional incompressible Navier-Stokes flow is analyzed by direct numerical simulation. The initial condition is such that the eddy viscosity is isotropic and negative. It is shown by concrete examples that the Navier-Stokes dynamics stabilizes negative eddy viscosity effects. in other words, this dynamics moves monotonically the initial negative eddy viscosity to positive values before relaxation due to viscous term occurs.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3