A Comparison of 1D Particle-in-Cell and Fluid Models for Hall Effect Thrusters

Lau, Raymond; Mansour, Adnan R.; Hara, K.

doi:10.2514/6.2021-3414

Cited by 2 publications

(6 citation statements)

References 8 publications

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“…The 1D PIC-MCC simulation code is benchmarked against the Turner test case based on a 1D capacitivelycoupled plasma [35], which is proposed as a benchmark problem in the LTP community. In addition, the present simulation code is benchmarked against two separate PIC-MCC results within the Plasma Dynamics Modeling Laboratory at Stanford University [34,36].…”

Section: A 1d Het Discharge Plasma Modelmentioning

confidence: 99%

“…In this model, the anode potential is 300 V and the potential at the cathode line is 0 V. The propellant is xenon and the mass flow rate from the anode is 5 mg s −1 . The maximum magnetic field is 15 mT and the axial profile of the radial magnetic field is used in this study follows the profile shown in references [8,36]. The computational domain is 5 cm and the length of the channel is 2.5 cm.…”

Section: Numerical Parametersmentioning

confidence: 99%

“…equation (20), is 25 ns using the ionization rate obtained from the time-averaged, PIC-MCC results. The 1D domain is discretized using 1000 cells, with 78 macroparticles per cell on average initially [36]. This results in approximately 75 computational macroparticles per cell on average at steady state.…”

Section: Numerical Parametersmentioning

confidence: 99%

“…After some low-frequency oscillations due to the transient from the initial condition, the simulation reaches a steady state by approximately 1 ms [36]. After reaching a steady state, the PIC-MCC simulation is performed for an additional 1 ms, during which time-averaged properties are obtained.…”

Section: Computational Run Timementioning

confidence: 99%

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Inertial and anisotropic pressure effects on cross-field electron transport in low-temperature magnetized plasmas

Yamashita

Lau

Hara

2023

J. Phys. D: Appl. Phys.

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In this paper, a one-dimensional (1D) particle-in-cell Monte Carlo collision (PIC-MCC) model is developed to investigate the effects of anisotropic pressure and inertial terms due to non-Maxwellian velocity distribution functions on cross-field electron transport. The conservation of momentum is evaluated by taking the moments of the first-principles gas-kinetic equation. A steady-state discharge is obtained without any low-frequency ionization oscillations by considering an anomalous electron scattering profile. The results obtained from a 1D PIC-MCC model are compared with fluid models, including the quasi-neutral drift-diffusion, non-neutral drift-diffusion, and full fluid moment models. The discharge current obtained from the PIC-MCC model is in good agreement with the fluid models. The cross-field electron transport due to the inertial terms, i.e., the gradient of axial and azimuthal drift, is evaluated. Moreover, PICMCC simulation results show non-zero, anisotropic, off-diagonal pressure tensor terms due to asymmetric non-Maxwellian electron velocity distribution function, potentially contributing to cross-field electron transport.

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Section: A 1d Het Discharge Plasma Modelmentioning

confidence: 99%

Section: Numerical Parametersmentioning

confidence: 99%

Section: Numerical Parametersmentioning

confidence: 99%

Section: Computational Run Timementioning

confidence: 99%

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Inertial and anisotropic pressure effects on cross-field electron transport in low-temperature magnetized plasmas

Yamashita

Lau

Hara

2023

J. Phys. D: Appl. Phys.

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“…The present 2D axisymmetric simulation is developed based on an in-house, 2D Cartesian PIC code for low-temperature magnetized plasmas [19,20,26,27]. The MCC model used in the present axisymmetric PIC/MCC model is based on another in-house 1D PIC/MCC model [28], which is validated and benchmarked against [18,29].…”

Section: Axisymmetric Pic/mcc Modelmentioning

confidence: 99%

Effects of macroparticle weighting in axisymmetric particle-in-cell Monte Carlo collision simulations

Hara

Robertson²,

Kenney³

et al. 2023

Plasma Sources Sci. Technol.

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In this paper, the eﬀects of macroparticle weighting on the plasma discharge, particularly near the centerline, are investigated using a two-dimensional axisymmetric particle-in-cell Monte Carlo collision (PIC/MCC) model. A variable macroparticle weight according to the radial position of the macroparticles is employed to maintain suﬃcient number of macroparticles near the centerline of the plasma source. The plasma density obtained from the PIC/MCC simulations for low-pressure (25-100 mTorr) capacitively coupled plasmas (CCPs) is found to be artiﬁcially large when the macroparticle weight near the centerline is not well resolved, demonstrating the need for particle convergence studies for axisymmetric PIC/MCC simulations.

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A Comparison of 1D Particle-in-Cell and Fluid Models for Hall Effect Thrusters

Cited by 2 publications

References 8 publications

Inertial and anisotropic pressure effects on cross-field electron transport in low-temperature magnetized plasmas

Inertial and anisotropic pressure effects on cross-field electron transport in low-temperature magnetized plasmas

Effects of macroparticle weighting in axisymmetric particle-in-cell Monte Carlo collision simulations

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