Generalized weak turbulence theory
نویسندگان
چکیده
منابع مشابه
Toward a Theory of Interstellar Turbulence. I. Weak Alfvenic Turbulence
We study weak Alfvenic turbulence of an incompressible, magnetized fluid in some detail, with a view to developing a firm theoretical basis for the dynamics of small-scale turbulence in the interstellar medium. We prove that resonant 3-wave interactions are absent. We also show that the Iroshnikov-Kraichnan theory of incompressible, magnetohydrodynamic turbulence-which is widely accepted--descr...
متن کاملOn Generalized Weak Structures
Avila and Molina [1] introduced the notion of generalized weak structures which naturally generalize minimal structures, generalized topologies and weak structures and the structures α(g),π(g),σ(g) and β(g). This work is a further investigation of generalized weak structures due to Avila and Molina. Further we introduce the structures ro(g) and rc(g) and study the properties of the structures r...
متن کاملApplication of Weak Turbulence Theory to Fpu Model
The foundations of weak turbulence theory is explored through its application to the (alpha) Fermi-Pasta-Ulam (FPU) model, a simple weakly nonlinear dispersive system. A direct application of the standard kinetic equations would miss interesting dynamics of the energy transfer process starting from a large-scale excitation. This failure is traced to an enforcement of the exact resonance conditi...
متن کامل0 a Weak Turbulence Theory for Incompressible Mhd
We derive a weak turbulence formalism for incompressible MHD. Three–wave interactions lead to a system of kinetic equations for the spectral densities of energy and helicity. The kinetic equations conserve energy in all wavevector planes normal to the applied magnetic field B 0 ˆ e. Numerically and analytically, we find energy spectra E ± ∼ k n ± ⊥ , such that n + + n − = −4, where E ± are the ...
متن کاملImbalanced Weak MHD Turbulence
MHD turbulence consists of waves that propagate along magnetic fieldlines, in both directions. When two oppositely directed waves collide, they distort each other, without changing their respective energies. In weak MHD turbulence, a given wave suffers many collisions before cascading. “Imbalance” means that more energy is going in one direction than the other. In general, MHD turbulence is imb...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2000
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.1318358