Bridging the hybrid high-order and hybridizable discontinuous Galerkin methods

Bernardo Cockburn, Daniele A. Di Pietro, Alexandre Ern

Research output: Contribution to journalArticlepeer-review

79 Scopus citations

Abstract

We build a bridge between the hybrid high-order (HHO) and the hybridizable discontinuous Galerkin (HDG) methods in the setting of a model diffusion problem. First, we briefly recall the construction of HHO methods and derive some new variants. Then, by casting the HHO method in mixed form, we identify the numerical flux so that the HHO method can be compared to HDG methods. In turn, the incorporation of the HHO method into the HDG framework brings up new, efficient choices of the local spaces and a new, subtle construction of the numerical flux ensuring optimal orders of convergence on meshes made of general shape-regular polyhedral elements. Numerical experiments comparing two of these methods are shown.

Original languageEnglish (US)
Pages (from-to)635-650
Number of pages16
JournalESAIM: Mathematical Modelling and Numerical Analysis
Volume50
Issue number3
DOIs
StatePublished - May 1 2016

Keywords

  • Hybrid high-order
  • Hybridizable discontinuous Galerkin
  • Variable diffusion problems

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