14 citations · 20 across the 9 of their papers we have counts for
10 papers
On How Zonal Fields Suppress Reversed Shear Alfvén Eigenmode in Tokamak Plasmas
Ruirui Ma, Pengfei Liu, Liu Chen +2
Employing both nonlinear gyrokinetic simulations and theoretical analyses, we have discovered the novel result that, with energetic particle dynamics kept linear, the nonlinear sup…
Cross-scale Interaction between Microturbulence and Fishbone in Fusion Plasmas
Yuehao Ma, Bin Zhang, Pengfei Liu +7
Global gyrokinetic simulations are performed for the first time to investigate cross-scale interactions between electromagnetic ion temperature gradient (ITG) turbulence and fishbo…
Electromagnetic turbulence in EAST plasmas with internal transport barrier
Yuehao Ma, Pengfei Liu, Jian Bao +2
In this study, global nonlinear electromagnetic gyrokinetic simulations are conducted to investigate turbulence in the Internal transport barrier (ITB) region of the EAST tokamak d…
Saturation of fishbone instability through zonal flows driven by energetic particle transport in tokamak plasmas
G. Brochard, C. Liu, X. Wei +17
Gyrokinetic and kinetic-MHD simulations are performed for the fishbone instability in the DIII-D discharge #178631, chosen for validation of first-principles simulations to predict…
Helically-trapped electron mode in optimized stellarator
Javier H Nicolau, Xishuo Wei, Pengfei Liu +2
Global gyrokinetic simulations find a strong helically-trapped electron mode (HTEM) driven by density gradients in the optimized stellarator W7-X fusion experiment. The eigenmode s…
Formulation and verification of multiscale gyrokinetic simulation of kinetic-MHD processes in toroidal plasmas
Xishuo Wei, Pengfei Liu, Gyungjin Choi +11
A comprehensive gyrokinetic simulation model has been implemented in the global toroidal gyrokinetic code (GTC) and verified for studying low-frequency waves and turbulence in magn…
Global regularity for a family of 3D models of the axisymmetric Navier-Stokes equations
Thomas Y Hou, Pengfei Liu, Fei Wang
We consider a family of 3D models for the axi-symmetric incompressible Navier-Stokes equations. The models are derived by changing the strength of the convection terms in the axisy…
Optimal Local Multi-scale Basis Functions for Linear Elliptic Equations with Rough Coefficient
Thomas Y. Hou, Pengfei Liu
This paper addresses a multi-scale finite element method for second order linear elliptic equations with arbitrarily rough coefficient. We propose a local oversampling method to co…
A Heterogeneous Stochastic FEM Framework for Elliptic PDEs
Thomas Y. Hou, Pengfei Liu
We introduce a new concept of sparsity for the stochastic elliptic operator , which reflects the compactness of its inverse operator in…
Self-similar Singularity of a 1D Model for the 3D Axisymmetric Euler Equations
Thomas Y. Hou, Pengfei Liu
We investigate the self-similar singularity of a 1D model for the 3D axisymmetric Euler equations, which is motivated by a particular singularity formation scenario observed in num…