Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. Subjects: Physics >> Geophysics, Astronomy, and Astrophysics submitted time 2019-03-31
Abstract： Ideas and theories of turbulence based on modifying the Navier-Stokes equation, to obtain equilibrium and non-equilibrium time-reversible dynamical ensembles relevant to helical turbulence, are presented. Discussions of controlling helicity to control the aerodynamic force, heat and noise are presented, together with the compressible turbulence relevant statistical mechanics analysis. A helical time-reversible system for nonequilibrium dynamical ensemble is constructed. Applications are also remarked.
Peer Review Status:
Awaiting Review
Subjects: Physics >> Physics of Gases, Plasmas, and Electric Discharges Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2019-03-31
Abstract： In plasma turbulence, such as the solar wind, the helical and (nearly) periodic structures are not necessarily linear waves. Plasmas in different environments present different dynamical characters, admitting various nonlinear structures. It is presented here two alternative nonlinear mechanisms that lead to relevant chirality issues in solar wind, the helical turbulent modes and breathers. The former is explained by revisiting a recent proposal in studying solar wind with the extended magnetohydrodynamics, and the latter is argued with a list of sources of information from water waves, plasmas and Bos\'e-Einstein condensates, though a concrete solar wind model for it is still open. "
Peer Review Status:Awaiting Review
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