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题名: General Higher Order Extension to the Quiet Direct Simulation Method
作者: Y.‐J. Lin;M. R. Smith;H. M. Cave;J.‐C. Huang;J.‐S. Wu
贡献者: 國立臺灣海洋大學:商船學系
日期: 2010-07-10
上传时间: 2016-01-06T01:33:28Z
出版者: AIP Conference Proceedings
摘要: Abstract:Presented is the multi-dimensional extension of the Quiet Direct Simulation (QDS) method to general, higher order spatial accuracy. Due to the true directional nature of QDS, where volume-to-volume fluxes are computed as opposed to fluxes at cell interfaces, a volumetric reconstruction is required. In this approach, the conserved quantities are permitted to vary (according to a polynomial expression) across all simulated dimensions. Prior to flux computation, QDS particles are introduced using properties based on weighted moments taken over the polynomial reconstruction of conserved quantity fields. The resulting flux expressions are shown to exactly reproduce existing 2nd order extensions (for one-dimensional flows) while providing means for true multi-dimensional reconstruction and general higher order extensions. Here we will show a typical comparison among different spatial order extensions of QDS and other WENO (5th order accurate) based numerical scheme. The extension is demonstrated up to 5th order spatial accuracy and is shown to be comparable to or more accurate than the other higher order schemes.
關聯: 1333
显示于类别:[商船學系] 演講及研討會


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