Anisotropic turbulence decay in a far momentumless wake in a stratified medium

2009 ◽  
Vol 1 (5) ◽  
pp. 605-619 ◽  
Author(s):  
O. F. Voropaeva
Keyword(s):  
Stratified Medium ◽  
Anisotropic Turbulence ◽  
Turbulence Decay ◽  
Momentumless Wake

Decay of anisotropic turbulence.

AIAA Journal ◽  
1973 ◽  
Vol 11 (4) ◽  
pp. 546-548 ◽  
Author(s):  
HENRY J. TUCKER ◽  
S. FlRASAT ALI
Keyword(s):  
Anisotropic Turbulence

scholarly journals Decay of turbulence in a liquid metal duct flow with transverse magnetic field

2019 ◽  
Vol 867 ◽  
pp. 661-690 ◽  
Author(s):  
Oleg Zikanov ◽  
Dmitry Krasnov ◽  
Thomas Boeck ◽  
Semion Sukoriansky
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Large Scale ◽  
High Amplitude ◽  
Transverse Magnetic ◽  
Duct Flow ◽  
Velocity Fluctuations ◽  
Turbulence Decay ◽  
The Moment ◽  
Typical Length

Decay of honeycomb-generated turbulence in a duct with a static transverse magnetic field is studied via direct numerical simulations. The simulations follow the revealing experimental study of Sukoriansky et al. (Exp. Fluids, vol. 4 (1), 1986, pp. 11–16), in particular the paradoxical observation of high-amplitude velocity fluctuations, which exist in the downstream portion of the flow when the strong transverse magnetic field is imposed in the entire duct including the honeycomb exit, but not in other configurations. It is shown that the fluctuations are caused by the large-scale quasi-two-dimensional structures forming in the flow at the initial stages of the decay and surviving the magnetic suppression. Statistical turbulence properties, such as the energy decay curves, two-point correlations and typical length scales are computed. The study demonstrates that turbulence decay in the presence of a magnetic field is a complex phenomenon critically depending on the state of the flow at the moment the field is introduced.

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