Dispersion Analysis of HDG Methods |
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Authors: | Jay Gopalakrishnan Manuel Solano Felipe Vargas |
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Affiliation: | 1.Department of Mathematics and Statistics,Portland State University,Portland,USA;2.Departamento de Ingeniería Matemática and Centro de Investigación en Ingeniería Matemática (CI2MA),Universidad de Concepción,Concepción,Chile |
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Abstract: | This work presents a dispersion analysis of the Hybrid Discontinuous Galerkin (HDG) method. Considering the Helmholtz system, we quantify the discrepancies between the exact and discrete wavenumbers. In particular, we obtain an analytic expansion for the wavenumber error for the lowest order Single Face HDG (SFH) method. The expansion shows that the SFH method exhibits convergence rates of the wavenumber errors comparable to that of the mixed hybrid Raviart–Thomas method. In addition, we observe the same behavior for the higher order cases in numerical experiments. |
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