von Kármán-Howarth equation for three-dimensional two-fluid plasmas.

Andrés, N; Mininni, P D; Dmitruk, P; Gómez, D O

Andrés, N; Mininni, P D; Dmitruk, P; Gómez, D O.

Afiliação

Andrés N; Instituto de Astronomía y Física del Espacio, CONICET-UBA, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
Mininni PD; Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
Dmitruk P; Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
Gómez DO; Instituto de Física de Buenos Aires, CONICET-UBA, Ciudad Universitaria, 1428 Buenos Aires, Argentina.

Phys Rev E ; 93(6): 063202, 2016 Jun.

Article em En | MEDLINE | ID: mdl-27415372

RESUMO

We derive the von Kármán-Howarth equation for a full three-dimensional incompressible two-fluid plasma. In the long-time limit and for very large Reynolds numbers we obtain the equivalent of the hydrodynamic "four-fifths" law. This exact law predicts the scaling of the third-order two-point correlation functions, and puts a strong constraint on the plasma turbulent dynamics. Finally, we derive a simple expression for the 4/5 law in terms of third-order structure functions, which is appropriate for comparison with in situ measurements in the solar wind at different spatial ranges.

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev E Ano de publicação: 2016 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos

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