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Title: Discontinuous Skeletal Gradient Discretisation methods on polytopal meshes

Journal Article · · Journal of Computational Physics

Here, in this work we develop arbitrary-order Discontinuous Skeletal Gradient Discretisations (DSGD) on general polytopal meshes. Discontinuous Skeletal refers to the fact that the globally coupled unknowns are broken polynomials on the mesh skeleton. The key ingredient is a high-order gradient reconstruction composed of two terms: (i) a consistent contribution obtained mimicking an integration by parts formula inside each element and (ii) a stabilising term for which sufficient design conditions are provided. An example of stabilisation that satisfies the design conditions is proposed based on a local lifting of high-order residuals on a Raviart–Thomas–Nédélec subspace. We prove that the novel DSGDs satisfy coercivity, consistency, limit-conformity, and compactness requirements that ensure convergence for a variety of elliptic and parabolic problems. Lastly, links with Hybrid High-Order, non-conforming Mimetic Finite Difference and non-conforming Virtual Element methods are also studied. Numerical examples complete the exposition.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); Laboratory Directed Research and Development Program (LDRD)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1415391
Report Number(s):
LA-UR-17-24418; TRN: US1800792
Journal Information:
Journal of Computational Physics, Vol. 355, Issue C; ISSN 0021-9991
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (8)

An Advection-Robust Hybrid High-Order Method for the Oseen Problem journal March 2018
A Hybrid High‐Order method for finite elastoplastic deformations within a logarithmic strain framework
  • Abbas, Mickaël; Ern, Alexandre; Pignet, Nicolas
  • International Journal for Numerical Methods in Engineering, Vol. 120, Issue 3 https://doi.org/10.1002/nme.6137
journal July 2019
A third Strang lemma and an Aubin–Nitsche trick for schemes in fully discrete formulation journal September 2018
The High-Order Mixed Mimetic Finite Difference Method for Time-Dependent Diffusion Problems journal July 2019
Hybrid High-Order methods for finite deformations of hyperelastic materials journal January 2018
A Hybrid High-Order Discretization Method for Nonlinear Poroelasticity journal April 2020
Hybrid High-Order methods for finite deformations of hyperelastic materials text January 2017
An advection-robust Hybrid High-Order method for the Oseen problem preprint January 2017