Analysis of a space--time hybridizable discontinuous Galerkin method for the advection--diffusion problem on time-dependent domains
This work offers a theoretical foundation for a numerical method applied to time-dependent domain problems, which is an incremental advance for computational mathematicians.
The paper provides the first analysis of a space-time hybridizable discontinuous Galerkin method for advection-diffusion on time-dependent domains, proving well-posedness and a priori error estimates validated by a numerical example.
This paper presents the first analysis of a space--time hybridizable discontinuous Galerkin method for the advection--diffusion problem on time-dependent domains. The analysis is based on non-standard local trace and inverse inequalities that are anisotropic in the spatial and time steps. We prove well-posedness of the discrete problem and provide a priori error estimates in a mesh-dependent norm. Convergence theory is validated by a numerical example solving the advection--diffusion problem on a time-dependent domain for approximations of various polynomial degree.