Reducing turbulence by phase juggling

Youichi Murakami; Leonid Shtilman; Evgeny Levich

doi:10.1063/1.858399

Reducing turbulence by phase juggling

Youichi Murakami^*, Leonid Shtilman, Evgeny Levich

^*Corresponding author for this work

Fluid Mechanics and Heat Transfer

Research output: Contribution to journal › Article › peer-review

Abstract

The dynamics of decaying turbulence disturbed at small and intermediate scales by energy-conserving disturbances is investigated in direct numerical simulations at relatively low Reynolds number (R_λ≈20-30). Three types of disturbances are introduced. The reduction of the energy dissipation and related enstrophy growth is achieved by partial destruction of phase coherence ostensibly presented at almost all scales of turbulence. The disturbance preserving both energy and helicity spectrum has been found a most destructive one. Possible implications of the results for anisotropic turbulence is briefly discussed.

Original language	English
Pages (from-to)	1776-1781
Number of pages	6
Journal	Physics of fluids. A, Fluid dynamics
Volume	4
Issue number	8
DOIs	https://doi.org/10.1063/1.858399
State	Published - 1992

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title = "Reducing turbulence by phase juggling",

abstract = "The dynamics of decaying turbulence disturbed at small and intermediate scales by energy-conserving disturbances is investigated in direct numerical simulations at relatively low Reynolds number (Rλ≈20-30). Three types of disturbances are introduced. The reduction of the energy dissipation and related enstrophy growth is achieved by partial destruction of phase coherence ostensibly presented at almost all scales of turbulence. The disturbance preserving both energy and helicity spectrum has been found a most destructive one. Possible implications of the results for anisotropic turbulence is briefly discussed.",

author = "Youichi Murakami and Leonid Shtilman and Evgeny Levich",

year = "1992",

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AU - Levich, Evgeny

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N2 - The dynamics of decaying turbulence disturbed at small and intermediate scales by energy-conserving disturbances is investigated in direct numerical simulations at relatively low Reynolds number (Rλ≈20-30). Three types of disturbances are introduced. The reduction of the energy dissipation and related enstrophy growth is achieved by partial destruction of phase coherence ostensibly presented at almost all scales of turbulence. The disturbance preserving both energy and helicity spectrum has been found a most destructive one. Possible implications of the results for anisotropic turbulence is briefly discussed.

AB - The dynamics of decaying turbulence disturbed at small and intermediate scales by energy-conserving disturbances is investigated in direct numerical simulations at relatively low Reynolds number (Rλ≈20-30). Three types of disturbances are introduced. The reduction of the energy dissipation and related enstrophy growth is achieved by partial destruction of phase coherence ostensibly presented at almost all scales of turbulence. The disturbance preserving both energy and helicity spectrum has been found a most destructive one. Possible implications of the results for anisotropic turbulence is briefly discussed.

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DO - 10.1063/1.858399

M3 - מאמר

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EP - 1781

JO - Physics of fluids. A, Fluid dynamics

JF - Physics of fluids. A, Fluid dynamics

SN - 0899-8213

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Reducing turbulence by phase juggling

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