COMPARISONS OF MULTIDIMENSIONAL NONEQUILIBRIUM AND EQUILIBRIUM FLUID AND MONTE-CARLO MODELS FOR STREAMERS

被引:14
作者
GUO, JM
WU, CH
机构
[1] Auburn Univ, Auburn
关键词
D O I
10.1088/0022-3727/26/3/023
中图分类号
O59 [应用物理学];
学科分类号
摘要
The formation of ionizing channels and the propagation of cathode- and anode-directed streamers in nitrogen gas have been examined theoretically by a self-consistent, fully two-dimensional simulation, assuming a cylindrically symmetric geometry. The dynamical model of the electron, considering the photoionization effect, is described by equilibrium (a single-moment equation) and non-equilibrium (a three-moment equation) models. A more accurate flux-corrected transport (MAFCT) technique, which provides a solution for the steep and varying gradient problem, is used to solve the electron fluid equations. This is the first investigation of the gas pre-breakdown based on a non-equilibrium two-dimensional fluid model, which is more accurate than the equilibrium fluid model. The differences in the simulation results of the three- and single-moment fluid models for streamers are found. Moreover, a comparison with a Monte Carlo simulation result (a kinetic model) is used to test the validity of fluid models, and the comparison illustrates that the non-equilibrium fluid model provides a more accurate description than the equilibrium fluid model.
引用
收藏
页码:487 / 492
页数:6
相关论文
共 15 条
[1]   PROPAGATION OF IONIZING ELECTRON SHOCK-WAVES IN ELECTRICAL BREAKDOWN [J].
BAYLE, P ;
CORNEBOIS, B .
PHYSICAL REVIEW A, 1985, 31 (02) :1046-1058
[2]  
DAVIES AJ, 1978, P INT S GASEOUS DIEL, P84
[3]   NUMERICAL-SIMULATION OF STREAMER PROPAGATION IN NITROGEN AT ATMOSPHERIC-PRESSURE [J].
DHALI, SK ;
WILLIAMS, PF .
PHYSICAL REVIEW A, 1985, 31 (02) :1219-1221
[4]   COMPUTER SIMULATION OF ELECTRICAL BREAKDOWN IN GASES - AVALANCHE AND STREAMER FORMATION [J].
KLINE, LE ;
SIAMBIS, JG .
PHYSICAL REVIEW A, 1972, 5 (02) :794-&
[5]   TOWARDS A MORE ACCURATE FLUX CORRECTED TRANSPORT ALGORITHM [J].
KUNHARDT, EE ;
WU, C .
JOURNAL OF COMPUTATIONAL PHYSICS, 1987, 68 (01) :127-150
[6]   NONEQUILIBRIUM MACROSCOPIC DESCRIPTIONS OF ELECTRONS IN WEAKLY IONIZED-GASES [J].
KUNHARDT, EE ;
WU, J ;
PENETRANTE, B .
PHYSICAL REVIEW A, 1988, 37 (05) :1654-1662
[7]   DIRECT SOLUTION OF POISSON EQUATION IN CYLINDRICALLY SYMMETRIC GEOMETRY - A FAST ALGORITHM [J].
KUNHARDT, EE ;
WILLIAMS, PF .
JOURNAL OF COMPUTATIONAL PHYSICS, 1985, 57 (03) :403-414
[8]   DEVELOPMENT OF AN ELECTRON AVALANCHE AND ITS TRANSITION INTO STREAMERS [J].
KUNHARDT, EE ;
TZENG, Y .
PHYSICAL REVIEW A, 1988, 38 (03) :1410-1421
[9]  
Mitchner M., 1973, PARTIALLY IONIZED GA
[10]  
MORROW R, 1987, PHYS REV A, V31, P1778