High-Order Isogeometric Methods for Compressible Flows. II. Compressible Euler Equations
Abstract
This work extends the high-resolution isogeometric analysis approach established for scalar transport equations to the equations of gas dynamics. The group finite element formulation is adopted to obtain an efficient assembly procedure for the standard Galerkin approximation, which is stabilized by adding artificial viscosities proportional to the spectral radius of the Roe-averaged flux-Jacobian matrix. Excess stabilization is removed in regions with smooth flow profiles with the aid of algebraic flux correction \cite{KBNII}. The underlying principles are reviewed and it is shown that linearized FCT-type flux limiting \cite{Kuzmin2009} originally derived for nodal low-order finite elements ensures positivity-preservation for high-order B-Spline discretizations.
Cite
@article{arxiv.1809.10893,
title = {High-Order Isogeometric Methods for Compressible Flows. II. Compressible Euler Equations},
author = {Matthias Möller and Andrzej Jaeschke},
journal= {arXiv preprint arXiv:1809.10893},
year = {2018}
}
Comments
Accepted for publication in the Proceedings of the 19th International Conference on Finite Elements in Flow Problems (FEF 2017)