Imperial College London
Portrait Picture

Dr Julia E. Stawarz

Faculty of Natural Sciences, Department of Physics

Academic Visitor
 
 
 
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Contact

 

+44 (0)20 7594 7766j.stawarz

 
 
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Location

 

6M71Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pouquet:2020:10.1007/s12210-020-00951-5,
author = {Pouquet, A and Rosenberg, D and Stawarz, JE},
doi = {10.1007/s12210-020-00951-5},
journal = {ATTI Della Accademia Nazionale Dei Lincei Rendiconti Lincei Scienze Fisiche e Naturali},
pages = {949--961},
title = {Interplay between turbulence and waves: large-scale helical transfer, and small-scale dissipation and mixing in fluid and Hall-MHD turbulence},
url = {http://dx.doi.org/10.1007/s12210-020-00951-5},
volume = {31},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Novel features of turbulent flows have been analyzed recently, for example: (1) the possibility of an ideal invariant, such as the energy, to be transferred both to the small scales and to the large scales, in each case with a constant flux; (2) the existence of non-Gaussian wings in Probability Distribution Functions of kinetic, magnetic, and temperature fluctuations, together with their gradients, thus displaying large-scale as well as small-scale intermittency; and (3) the linear dependence on the control parameter of the effective dissipation in turbulence when non-linear eddies and waves interact. We shall briefly review these results with examples stemming from Solar Wind data, the atmosphere and the ocean with either magnetic fields, stratification, and/or rotation. In a second part, we shall examine numerically the inverse cascades of magnetic and of generalized helicity for Hall-MHD in the presence of forcing. These helical invariants in the ideal non-dissipative case involve various cross-correlations between the velocity and vorticity, the magnetic field, and the magnetic potential. For an ion inertial length larger than the forcing scale, the effect of the waves is significant. It leads to an exponential attenuation of the inverse cascade to large scales, since, through the velocity and vorticity, small scales play an increasing dynamical role for a strong Hall current.
AU  - Pouquet,A
AU  - Rosenberg,D
AU  - Stawarz,JE
DO  - 10.1007/s12210-020-00951-5
EP  - 961
PY  - 2020///
SN  - 2037-4631
SP  - 949
TI  - Interplay between turbulence and waves: large-scale helical transfer, and small-scale dissipation and mixing in fluid and Hall-MHD turbulence
T2  - ATTI Della Accademia Nazionale Dei Lincei Rendiconti Lincei Scienze Fisiche e Naturali
UR  - http://dx.doi.org/10.1007/s12210-020-00951-5
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000561255900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://link.springer.com/article/10.1007%2Fs12210-020-00951-5
UR  - http://hdl.handle.net/10044/1/83435
VL  - 31
ER  -
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