The DPG Method for the Convection-Reaction Problem, Revisited
Journal Article
·
· Computational Methods in Applied Mathematics
- Univ. of Texas, Austin, TX (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of Texas, Austin, TX (United States); Basque Center for Applied Mathematics, Bilbao (Spain)
In this work, we study both conforming and non-conforming versions of the practical DPG method for the convection-reaction problem. We determine that the most common approach for DPG stability analysis – construction of a local Fortin operator – is infeasible for the convection-reaction problem. We then develop a line of argument based on a direct proof of discrete stability; we find that employing a polynomial enrichment for the test space does not suffice for this purpose, motivating the introduction of a (two-element) subgrid mesh. The argument combines mathematical analysis with numerical experiments.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); European Research Council (ERC)
- Grant/Contract Number:
- NA0003525; 218322; 1819101; 101017984
- OSTI ID:
- 1883191
- Report Number(s):
- SAND2022-7111J; 706744
- Journal Information:
- Computational Methods in Applied Mathematics, Vol. 23, Issue 1; ISSN 1609-4840
- Publisher:
- de GruyterCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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