Numerical accuracy and convergence with EMC3-EIRENE

作     者：Kristel GHOOS Heinke FRERICHS Wouter DEKEYSER Giovanni SAMAEY Martine BAELMANS Kristel GHOOS;Heinke FRERICHS;Wouter DEKEYSER;Giovanni SAMAEY;Martine BAELMANS

作者机构：KU LeuvenDepartment of Mechanical EngineeringB-3001LeuvenBelgium University of Wisconsin MadisonDepartment of Engineering PhysicsWI 53706United States of America KU LeuvenDepartment of Computer ScienceB-3001LeuvenBelgium 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2020年第22卷第5期

页      面：5-15页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：sponsored by Flanders Innovation and Entrepreneurship(IWT.141064) a travel grant(V4.128.18N)from Research Foundation—Flanders(FWO) supported by the Research Foundation Flanders(FWO)under project grant G078316N funded by the Research Foundation—Flanders(FWO) the Flemish Government—department EWI 

主　　题：convergence Monte Carlo numerics plasma edge EMC3-EIRENE 

摘      要：The iterative Monte Carlo(MC)code EMC3-EIRENE is frequently used for plasma edge simulations in 3 D *** far,a quantitative evaluation of the numerical quality of the code results remains an open *** this paper,we demonstrate a framework for the practical assessment of accuracy and convergence with ***,we provide a first accuracy analysis with EMC3-EIRENE for a DIII-D divertor edge plasma ***,we introduce post-processing averaging to efficiently reduce the variance of the statistical ***,we estimate the deterministic error contributions based on their theoretical reduction rates by comparing solutions with a different grid resolution,time step,or number of MC particles per ***,using parameterized expressions for the error and the computational time,suitable numerical parameters are determined to achieve faster and/or more accurate *** found that simulations can be more than twice as fast without losing accuracy by making use of post-processing averaging and choosing optimal *** addition,we conclude that the discretization error is the dominant error contribution for the case selected in this paper,which demonstrates the importance of constructing an adequate mesh.