55 citations · 381 across the 38 of their papers we have counts for
7 papers · 1 filter
Enhanced entropy production in heat-flux-driven plasma sheath
Yuji Ohno, Zensho Yoshida
The plasma sheath sets a stage for a strongly nonlinear coupling of the thermal, kinetic, and electric energies of plasma in a non-equilibrium, open environment. The pressure, velo…
Nonlinear Helicons ---an analytical solution elucidating multi-scale structure
Hamdi M. Abdelhamid, Zensho Yoshida
The helicon waves exhibit varying characters depending on plasma parameters, geometry, and wave numbers. Here we elucidate an intrinsic multi-scale property embodied by the combina…
Rattleback: a model of how geometric singularity induces dynamic chirality
Zensho Yoshida, Tadashi Tokieda, Philip J. Morrison
The rattleback is a boat-shaped top with an asymmetric preference in spin. Its dynamics can be described by nonlinearly coupled pitching, rolling, and spinning modes. The chirality…
Multi-region relaxed magnetohydrodynamics in plasmas with slowly changing boundaries --- resonant response of a plasma slab
Robert L. Dewar, Stuart R. Hudson, Amitava Bhattacharjee +1
The adiabatic limit of a recently proposed dynamical extension of Taylor relaxation, \emph{multi-region relaxed magnetohydrodynamics} (MRxMHD) is summarized, with special attention…
Epi-two-dimensional flow and generalized enstrophy
Zensho Yoshida, Philip J. Morrison
The conservation of the enstrophy ( norm of the vorticity ) plays an essential role in the physics and mathematics of two-dimensional (2D) Euler fluids. Generalizing to com…
Up-Hill Diffusion Creating Density Gradient - What is the Proper Entropy?
Naoki Sato, Zensho Yoshida
It is always some constraint that yields any nontrivial structure from statistical averages. As epitomized by the Boltzmann distribution, the energy conservation is often the princ…