6 papers
Arbitrary Order Energy and Enstrophy Conserving Finite Element Methods for 2D Incompressible Fluid Dynamics and Drift-Reduced Magnetohydrodynamics
Milan Holec, Ben Zhu, Ilon Joseph +5
Maintaining conservation laws in the fully discrete setting is critical for accurate long-time behavior of numerical simulations and requires accounting for discrete conservation p…
Drift reduced Landau fluid model for magnetized plasma turbulence simulations in BOUT++ framework
Ben Zhu, Haruki Seto, Xue-qiao Xu +1
Recently the drift-reduced Landau fluid six-field turbulence model within the BOUT++ framework has been upgraded. In particular, this new model employs a new normalization, adds a…
Generalized slab universal instability and its appearance in pair plasma
Ben Zhu, Manaure Francisquez, Barrett N. Rogers +1
A generalized linear dispersion relation of electromagnetic slab universal modes is derived, taking into account arbitrary ion charge state, electron finite Larmor radius (FLR) eff…
Fluid & Gyrokinetic turbulence in open field-line, helical plasmas
Manaure Francisquez, Tess N. Bernard, Ben Zhu +3
Two-fluid Braginskii codes have simulated open-field line turbulence for over a decade, and only recently has it become possible to study these systems with continuum gyrokinetic c…
Machine Learning Surrogate Models for Landau Fluid Closure
Chenhao Ma, Ben Zhu, Xue-qiao Xu +1
The first result of applying the machine/deep learning technique to the fluid closure problem is presented in this paper. As a start, three different types of neural networks (mult…
Gyrokinetic theory of slab universal modes and the non-existence of the Gradient Drift Coupling (GDC) instability
Barrett N. Rogers, Ben Zhu, Manaure Francisquez
A gyrokinetic linear stability analysis of a collisionless slab geometry in the local approximation is presented. We focus on universal (or entropy) modes driven by…