An improved immersed finite element particle-in-cell method for plasma simulation

Bai, Jinwei; Cao, Yong; Chu, Yuchuan; Zhang, Xu

doi:10.1016/j.camwa.2017.08.001

Cited by 15 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The other two methods are the DIM particle pusher and the DEX particle pusher, where different timesteps are used. The following relationship is introduced to analyze the accuracy of the particle pusher with respect to the time-step: [31] Err…”

Section: Particle Pusher Testmentioning

confidence: 99%

Speeding-up direct implicit particle-in-cell simulations in bounded plasma by obtaining future electric field through explicitly propulsion of particles

Tan 谭,

Huang 黄,

Ji 季

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

The direct implicit Particle-In-Cell is a powerful kinetic method for researching plasma characteristics. However, it is time-consuming to obtain the future electromagnetic field in such method since the field equations contain time-dependent matrix coefficients. In this work, we propose to explicitly push particles and obtain the future electromagnetic field based on the information about the particles in the future. The new method retains the form of implicit particle pusher, but the future field is obtained by solving the traditional explicit equation. Several numerical experiments, including the motion of charged particle in electromagnetic field, plasma sheath and free diffusion of plasma into vacuum, are implemented to evaluate the performance of the method. The results demonstrate that the proposed method can suppress Finite-Grid-Instability resulting from the coarse spatial resolution in electron Debye length through the strong damping of high-frequency plasma oscillation, while accurately describe low-frequency plasma phenomena, with the price of losing the numerical stability at large time-step. We believe that this work is helpful for people to research the bounded plasma by using Particle-In-Cell simulations.

show abstract

Section: Particle Pusher Testmentioning

confidence: 99%

Speeding-up direct implicit particle-in-cell simulations in bounded plasma by obtaining future electric field through explicitly propulsion of particles

Tan 谭,

Huang 黄,

Ji 季

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

“…The social network analysis (SNA) provides a quantitative method of describing complexly intertwining relationships among multiple stakeholders and hence enables improvements in management efficiency [65]. The combination of SNA and stakeholders produces systematic insights to align decision making to cope with risks [62,66]. For instance, Hamilton et al [67] analyzed the degree of fit between landowners and land-use organizations to promote the social-ecological network balance.…”

Section: The Framework Of This Studymentioning

confidence: 99%

Unraveling Risk Networks of Cultivated Land Protection: An Exploratory Stakeholder-Oriented Case Study in Xiliuhe Town, Hubei Province, China

Guo

Cai

et al. 2021

Land

View full text Add to dashboard Cite

The protection of cultivated land plays an important role in ensuring food security, maintaining social stability, and promoting economic development. The protection of cultivated land involves a range of stakeholders (e.g., governments at different levels, farmers, and land-use organizations) and entails intertwined risk factors (e.g., to economic, environmental, social, and political factors). Therefore, it is crucial to identify and assess key stakeholders and associated risks to better align land protection policies. However, previous studies of risk are fragmented, and there has been little research targeting the complex interactions among risk factors in the protection of cultivated land. Taking Xiliuhe Town as an example, this study analyzes complex and intertwined risk factors from a network perspective in an in-depth case study in a major grain-producing area. The results show that: (1) the risk-factor network of cultivated land protection is relatively sparse, with a total of 142 nodes and 253 links; (2) local governments and land flow-out farmers are the core stakeholders, with strong power and connectivity in the network; (3) taking into account key stakeholders and associated risk factors, a framework for mitigating risks is developed, and a network simulation is performed. Using the simulation results, the effectiveness of the risk-mitigation strategies is assessed and validated. These results shed new light on cultivated land protection and sustainable agricultural development in emerging countries.

show abstract

“…In this paper, a 2D implicit immersed-finite-element particle-in-cell (IFE-PIC) model [16] is introduced to study a single set of RF grid systems. It has huge advantages in computing the plasma problems that have complex interfaces and need to be divided into regular grids [17][18][19][20][21][22][23][24][25]. This model can significantly reduce the computing cost [16,[26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the radio-frequency biased accelerating system in ion thrusters

Bai

Cao

et al. 2023

Plasma Sci. Technol.

Self Cite

View full text Add to dashboard Cite

A 2D-3V implicit immersed-finite-element particle-in-cell (IFE-PIC) model has been introduced to investigate the RF self-bias accelerating system applied in the RF ion thruster. A set of holes in a two-grid system with slit apertures is simulated in Cartesian coordinates. The characteristics of the plasma plume, such as the ion density, the neutralization rate and the ion and electron current density have been investigated for different RF voltage amplitudes (600-1200V) and frequencies (6-30MHz). Furthermore, the performance of the thruster has also been carefully studied. The simulation results show that the well-focused plasma beam can be formed when the voltage amplitude is larger than 900V and the frequency exceeds the reciprocal of ion transit time (>= 12 MHz) in our simulation cases. The performance of the system can be evidently improved by increasing the voltage amplitude and the frequency, and the loss of the particle and thrust are reduced correspondingly. The bulk region of the plasma beam in the downstream shows a good quasi-neutrality and the ions are dominant in the peripheral region when the well-focused state is achieved. The high ion density beamlet in the periphery of the ion beam is closer to the axis when the voltage amplitude is increasing, while it is expanded radially with increasing the frequency. The backstream electrons to the upstream have been observed and it mainly occurs in the phase which the electron cannot escape.

show abstract

An improved immersed finite element particle-in-cell method for plasma simulation

Cited by 15 publications

References 30 publications

Speeding-up direct implicit particle-in-cell simulations in bounded plasma by obtaining future electric field through explicitly propulsion of particles

Speeding-up direct implicit particle-in-cell simulations in bounded plasma by obtaining future electric field through explicitly propulsion of particles

Unraveling Risk Networks of Cultivated Land Protection: An Exploratory Stakeholder-Oriented Case Study in Xiliuhe Town, Hubei Province, China

Numerical study of the radio-frequency biased accelerating system in ion thrusters

Contact Info

Product

Resources

About