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    ADAPTIVE DISCONTINUOUS GALERKIN FINITE ELEMENTS FOR ADVECTIVE ALLEN-CAHN EQUATION
    (Amer Inst Mathematical Sciences-Aims, 2021) Uzunca, Murat; Sariaydin-Filibelioglu, Ayse
    We apply a space adaptive interior penalty discontinuous Galerkin method for solving advective Allen-Cahn equation with expanding and contracting velocity fields. The advective Allen-Cahn equation is first discretized in time and the resulting semi-linear elliptic PDE is solved by an adaptive algorithm using a residual-based a posteriori error estimator. The a posteriori error estimator contains additional terms due to the non-divergence-free velocity field. Numerical examples demonstrate the effectiveness and accuracy of the adaptive approach by resolving the sharp layers accurately.