The main purpose of this paper is to describe a space-time discontinuous Galerin (DG) method based on an extended space-time approximation
space for the linear first order hyperbolic equation that contains a high frequency component. We extend the space-time DG spaces of tensor-product of
polynomials by adding trigonometric functions in space and time that capture
the oscillatory behavior of the solution. We construct the method by combining the basic framework of the space-time DG method with the extended finite
element method. The basic principle of the method is integrating the features
of the partial differential equation with the standard space-time spaces in the
approximation. We present error analysis of the space-time DG method for
the linear first order hyperbolic problems. We show that the new space-time
DG approximation has an improvement in the convergence compared to the
space-time DG schemes with tensor-product polynomials. Numerical examples verify the theoretical findings and demonstrate the effects of the proposed
method.
Discontinuous Galerkin finite element methods space-time discontinuous Galerkin methods hyperbolic problems high frequency solutions
Primary Language | English |
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Subjects | Applied Mathematics |
Journal Section | Research Articles |
Authors | |
Publication Date | June 30, 2020 |
Submission Date | March 25, 2019 |
Acceptance Date | October 8, 2019 |
Published in Issue | Year 2020 Volume: 69 Issue: 1 |
Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics.
This work is licensed under a Creative Commons Attribution 4.0 International License.