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- W2022291239 abstract "Phenomenological theories of strong incompressible magnetohydrodynamic (MHD) turbulence derived by Goldreich and Sridhar (GS) in 1995 and by Boldyrev in 2006 are only applicable to turbulence with vanishing cross-helicity. In this study, these two theories are generalized to treat turbulence with nonvanishing cross-helicity in such a way that the relation (w+/w−)2=(e+/e−)2 observed in numerical simulations is satisfied. The average energy (second order structure function) in the generalized GS theory is E(r⊥)=ϕ1(σc)(er⊥)2/3 and that in the generalized Boldyrev theory is E(r⊥)=ϕ2(σc)(vAer⊥)1/2, where the function ϕ(σc) describes the dependence on the normalized cross-helicity σc. The form of the function ϕ(σc) is derived through a renormalization of the variable σc that yields a one parameter family of solutions. The theory derived by Lithwick, Goldreich, and Sridhar (LGS) in 2007 is a special case of the generalized GS theory derived here; however, other generalizations of the GS theory are obtained that ..." @default.
- W2022291239 created "2016-06-24" @default.
- W2022291239 creator A5061912751 @default.
- W2022291239 date "2011-01-01" @default.
- W2022291239 modified "2023-09-24" @default.
- W2022291239 title "On the cross-helicity dependence of the energy spectrum in magnetohydrodynamic turbulence" @default.
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- W2022291239 doi "https://doi.org/10.1063/1.3533671" @default.
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