14 citations · 41 across the 9 of their papers we have counts for
9 papers
Relaxed magnetohydrodynamics with cross-field flow
Arash Tavassoli, Stuart R. Hudson, Zhisong Qu +1
The phase-space Lagrangian model of Dewar et al. (Phys. Plasmas 27, 062507, 2020) provides a framework for incorporating cross-field flow into relaxed equilibria while retaining id…
Near-ideal relaxed MHD in slab geometry
Arash Tavassoli, Stuart R. Hudson, Zhisong Qu +1
We investigate the solutions of the relaxed MHD model (RxMHD) of Dewar \& Qu [J. Plasma Phys. {\bf 88}, 835880101 (2022)]. This model generalizes Taylor relaxation by including the…
Beyond Strang: A practical assessment of some second-order 3-splitting methods
Raymond J. Spiteri, Arash Tavassoli, Siqi Wei +1
Operator splitting is a popular divide-and-conquer strategy for solving differential equations. Typically, the right-hand side of the differential equation is split into a number o…
The electron cyclotron drift instability: a comparison of particle-in-cell and continuum Vlasov simulations
Arash Tavassoli, Mina Papahn Zadeh, Andrei Smolyakov +2
The linear and nonlinear characteristics of the electron cyclotron drift instability (ECDI) have been studied through the particle-in-cell (PIC) and continuum Vlasov simulation met…
Backward waves in the nonlinear regime of the Buneman instability
Arash Tavassoli, Magdi Shoucri, Andrei Smolyakov +2
Observation of low- and high-frequency backward waves in the nonlinear regime of the Buneman instability is reported. Intense low-frequency backward waves propagating in the direct…
The role of noise in PIC and Vlasov simulations of the Buneman instability
Arash Tavassoli, Oleksandr Chapurin, Marilyn Jimenez +7
The effects of noise in particle-in-cell (PIC) and Vlasov simulations of the Buneman instability in unmagnetized plasmas are studied. It is found that, in the regime of low drift v…
Nonlinear regimes of the electron cyclotron drift instability in Vlasov simulations
Arash Tavassoli, Andrei Smolyakov, Magdi Shoucri +1
We report on a novel investigation of the nonlinear regime of the electron cyclotron drift instability, using a grid-based Vlasov simulation. It is shown that the instability occur…
Entropy as an adiabatic invariant
Afshin Montakhab, Arash Tavassoli
This short article was submitted to Nature Physics as a Correspondence. The intention was to provide a brief albeit significant criticism of the work of J. Dunkel and S. Hilbert, \…
Microcanonical entropy: consistency and adiabatic invariance
Arash Tavassoli, Afshin Montakhab
Attempts to establish microcanonical entropy as an adiabatic invariant date back to works of Gibbs and Hertz. More recently, a consistency relation based on adiabatic invariance ha…