2016/03/14 by Ruihan Guo, Guo, Ruihan, Francis Filbet +1
Engineering · Mathematics · #Advanced Numerical Methods in Computational Mathematics #Applied mathematics #Computational Fluid Dynamics and Aerodynamics #Computer science #Discontinuous Galerkin method #Discretization #FOS: Mathematics #Finite element method #Flow (mathematics) #Galerkin method #Geometry #Grid #Lattice Boltzmann Simulation Studies #Level set (data structures) #Level set method #Mathematical analysis #Mathematical optimization #Mathematics #Numerical Analysis (math.NA) #Physics #Set (abstract data type) #Solver #Willmore energy
paper · pdf · doi:10.48550/arxiv.1603.04260
openalex publication_date 2016/03/14 · openalex created_date 2019/07/30 · openalex updated_date 2026/08/05
The level set method is often used to capture interface behavior in two or three dimensions. In this paper, we present a combination of local discontinuous Galerkin (LDG) method and level set method for simulating Willmore flow. The LDG scheme is energy stable and mass conservative, which are good properties comparing with other numerical methods. In addition, to enhance the efficiency of the proposed LDG scheme and level set method, we employ a p-adaptive local discontinuous Galerkin technique, which applies high order polynomial approximations around the zero level set and low order ones away from the zero level set. A major advantage of the level set method is that the topological changes are well defined and easily performed. In particular, given the stiffness of Willmore flow, a high order semi-implicit Runge-Kutta method is employed for time discretization, which allows larger time step. The equations at the implicit time level are linear, we demonstrate an efficient and practical multi-grid solver to solve the equations. Numerical examples are given to illustrate the combination of the LDG scheme and level set method provides an efficient and practical approach when simulating the Willmore flow.