Finite elements for CFD—How does the theory compare?

✍ Scribed by A.J. Baker; D.J. Chaffin; J.S. Iannelli; S. Roy

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 260 KB
• Volume: 31
• Category: Article
• ISSN: 0271-2091
• DOI: 10.1002/(sici)1097-0363(19990915)31:1<345::aid-fld974>3.0.co;2-l

✦ Synopsis

The quest continues for accurate and efficient computational fluid dynamics (CFD) algorithms for convection-dominated flows. The boundary value 'optimal' Galerkin weak statement invariably requires manipulation to handle the disruptive character introduced by the discretized first-order convection term. An incredible variety of methodologies have been derived and examined to address this issue, in particular, seeking achievement of monotone discrete solutions in an efficient implementation. The UT CFD research group has participated in this search, leading to the development of consistent, encompassing theoretical statements exhibiting quality performance, including generalized Taylor series (Lax -Wendroff) methods, characteristic flux resolutions, subgrid embedded high-degree Lagrange bases and assembled stencil optimization for finite element weak statement implementations. For appropriate model problems, recent advances have led to accurate monotone methods with linear basis efficiency. This contribution highlights the theoretical developments and presents quantitative documentation of achieved high-quality solutions.