TY - JOUR

T1 - A fast solver of plasma fluid model in dielectric-barrier-discharge simulation

AU - Sato, Shintaro

AU - Shiroto, Takashi

AU - Takahashi, Masayuki

AU - Ohnishi, Naofumi

N1 - Publisher Copyright:
© 2020 IOP Publishing Ltd.

PY - 2020/7

Y1 - 2020/7

N2 - A novel method for fast simulation of discharge, which uses a plasma fluid model, is proposed with a focus on the small space-charge variation in the calculation of electric field. A simple scalar equation is employed in the proposed method to calculate the electric field variation instead of solving Poisson's equation at every time step when the dielectric relaxation time is relatively large compared to the time step interval. We perform numerical simulations of surface dielectric-barrier-discharge at atmospheric pressure, which is utilized in developing an active flow control device referred to as a plasma actuator, and demonstrate significant reduction of solve count of the Poisson's equation throughout the simulation. The simulation result indicates that the CPU time required for the electric-field calculation becomes one order of magnitude smaller than that of the conventional approach within an error margin of one percent when several-10 kHz sinusoidal voltage is applied for the discharge. Moreover, a cost reduction of almost two orders of magnitude is achieved in the lower-frequency case with the same order of the error in the several-10 kHz case. Our approach enables large-scale discharge simulation and simulation of multi-physics phenomenon including the discharge physics with a practical computational cost.

AB - A novel method for fast simulation of discharge, which uses a plasma fluid model, is proposed with a focus on the small space-charge variation in the calculation of electric field. A simple scalar equation is employed in the proposed method to calculate the electric field variation instead of solving Poisson's equation at every time step when the dielectric relaxation time is relatively large compared to the time step interval. We perform numerical simulations of surface dielectric-barrier-discharge at atmospheric pressure, which is utilized in developing an active flow control device referred to as a plasma actuator, and demonstrate significant reduction of solve count of the Poisson's equation throughout the simulation. The simulation result indicates that the CPU time required for the electric-field calculation becomes one order of magnitude smaller than that of the conventional approach within an error margin of one percent when several-10 kHz sinusoidal voltage is applied for the discharge. Moreover, a cost reduction of almost two orders of magnitude is achieved in the lower-frequency case with the same order of the error in the several-10 kHz case. Our approach enables large-scale discharge simulation and simulation of multi-physics phenomenon including the discharge physics with a practical computational cost.

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U2 - 10.1088/1361-6595/ab9b18

DO - 10.1088/1361-6595/ab9b18

M3 - Article

AN - SCOPUS:85091258430

SN - 0963-0252

VL - 29

JO - Plasma Sources Science and Technology

JF - Plasma Sources Science and Technology

IS - 7

M1 - 075007

ER -