IFIBA 22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
von Karman-Howarth equation for three-dimensional two-fluid plasmas
Autor/es:
PABLO DMITRUK; PABLO MININNI; ANDRÉS NAHUEL; DANIEL O. GOMEZ
Revista:
PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2016 vol. 93 p. 632021 - 632027
ISSN:
1063-651X
Resumen:
We derive the von Karman?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 putsa strong constraint on the plasma turbulent dynamics. Finally, we derive a simple expression for the 4/5 law interms of third-order structure functions, which is appropriate for comparison with in situ measurements in thesolar wind at different spatial ranges.
