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The shifted boundary method for embedded domain computations. Part I: Poisson and Stokes problems

Journal Article · · Journal of Computational Physics
 [1];  [2]
  1. Duke Univ., Durham, NC (United States); DOE/OSTI
  2. Duke Univ., Durham, NC (United States)

We propose a new finite element method for embedded domain computations, which falls in the category of surrogate/approximate boundary algorithms. The key feature of the proposed approach is the idea of shifting the location where boundary conditions are applied from the true to the surrogate boundary, and to appropriately modify the shifted boundary conditions, enforced weakly, in order to preserve optimal convergence rates of the numerical solution. This process yields a method which, in our view, is simple, efficient, and also robust, since it is not affected by the small-cut-cell problem. Although general in nature, here we apply this new concept to the Poisson and Stokes problems. We present in particular the full analysis of stability and convergence for the case of the Poisson operator, and numerical tests for both the Poisson and Stokes equations, for geometries of progressively higher complexity.

Research Organization:
Duke University, Durham, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
Grant/Contract Number:
SC0012169
OSTI ID:
1611740
Journal Information:
Journal of Computational Physics, Journal Name: Journal of Computational Physics Journal Issue: C Vol. 372; ISSN 0021-9991
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (16)

Equal Higher Order Analysis of an Unfitted Discontinuous Galerkin Method for Stokes Flow Systems journal April 2022
$\phi$-FEM: A Finite Element Method on Domains Defined by Level-Sets journal January 2020
Projection-based reduced order models for a cut finite element method in parametrized domains preprint January 2019
A Reduced-Order Shifted Boundary Method for Parametrized incompressible Navier-Stokes equations text January 2019
Obtaining higher-order Galerkin accuracy when the boundary is polygonally approximated preprint January 2020
Accurate iteration-free mixed-stabilised formulation for laminar incompressible Navier-Stokes: Applications to fluid-structure interaction text January 2020
Random geometries for optimal control PDE problems based on fictitious domain FEMS and cut elements preprint January 2020
Cut finite element error estimates for a class of nonlinear elliptic PDEs preprint January 2020
Analysis of the Shifted Boundary Method for the Poisson Problem in General Domains preprint January 2020
Comparison of Shape Derivatives using CutFEM for Ill-posed Bernoulli Free Boundary Problem preprint January 2020
Convergence Analysis for Computation of Coupled Advection-Diffusion-Reaction Problems preprint January 2020
Stability and conditioning of immersed finite element methods: analysis and remedies preprint January 2022
The Shifted Interface Method: A flexible approach to embedded interface computations journal October 2019
Dirichlet boundary value correction using Lagrange multipliers journal September 2019
Shift boundary material point method: an image-to-simulation workflow for solids of complex geometries undergoing large deformation journal May 2019
An immersed discontinuous Galerkin method for compressible Navier-Stokes equations on unstructured meshes text January 2019

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