DETERMINATION OF ANOMALOUS EXPONENTS OF STRUCTURE FUNCTIONS IN 2-DIMENSIONAL MAGNETOHYDRODYNAMIC TURBULENCE

Authors
POLITANO H POUQUET A CARBONE V
Citation
H. Politano et al., DETERMINATION OF ANOMALOUS EXPONENTS OF STRUCTURE FUNCTIONS IN 2-DIMENSIONAL MAGNETOHYDRODYNAMIC TURBULENCE, Europhysics letters, 43(5), 1998, pp. 516-521
Citations number
30
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
43
Issue
5
Year of publication
1998
Pages
516 - 521
Database
ISI
SICI code
0295-5075(1998)43:5<516:DOAEOS>2.0.ZU;2-O
Abstract
We determine numerically in two space dimensions the anomalous exponen ts of structure functions of the velocity v, the magnetic field b and the Elsasser variables z(+/-) = v +/- b up to order eight. To that eff ect, we make use of new exact relationships derived recently for mixed z(+/-) third-order correlators. These exponents are compared to exist ing models of intermittency for either neutral or MHD flows, none of w hich seem to apply, possibly indicative of a more complex behavior for MHD flows than for neutral fluids.