Communications on Applied Mathematics and Computation ›› 2023, Vol. 5 ›› Issue (1): 116-142.doi: 10.1007/s42967-021-00150-5

• ORIGINAL PAPERS • Previous Articles     Next Articles

High-Order Semi-Lagrangian WENO Schemes Based on Non-polynomial Space for the Vlasov Equation

Andrew Christlieb1, Matthew Link1, Hyoseon Yang1, Ruimeng Chang2   

  1. 1 Department of Computational Mathematics, Science and Engineering, Michigan State University, East Lansing, MI 48824, USA;
    2 Department of Mathematical Sciences, Xi'an Jiaotong-Liverpool University, Suzhou 215123, Jiangsu, China
  • Received:2021-01-30 Revised:2021-06-10 Online:2023-03-20 Published:2023-03-08
  • Contact: Hyoseon Yang,E-mail:hyoseon@msu.edu;Andrew Christlieb,E-mail:christli@msu.edu;Matthew Link,E-mail:linkmat1@msu.edu;Ruimeng Chang,E-mail:ruimeng.chang17@student.xjtlu.edu.cn E-mail:hyoseon@msu.edu;christli@msu.edu;linkmat1@msu.edu;ruimeng.chang17@student.xjtlu.edu.cn
  • Supported by:
    We would like to thank AFOSR and NSF for their support of this work under grants FA9550-19-1-0281 and FA9550-17-1-0394 and NSF grant DMS 191218.

Abstract: In this paper, we present a semi-Lagrangian (SL) method based on a non-polynomial function space for solving the Vlasov equation. We fnd that a non-polynomial function based scheme is suitable to the specifcs of the target problems. To address issues that arise in phase space models of plasma problems, we develop a weighted essentially non-oscillatory (WENO) scheme using trigonometric polynomials. In particular, the non-polynomial WENO method is able to achieve improved accuracy near sharp gradients or discontinuities. Moreover, to obtain a high-order of accuracy in not only space but also time, it is proposed to apply a high-order splitting scheme in time. We aim to introduce the entire SL algorithm with high-order splitting in time and high-order WENO reconstruction in space to solve the Vlasov-Poisson system. Some numerical experiments are presented to demonstrate robustness of the proposed method in having a high-order of convergence and in capturing non-smooth solutions. A key observation is that the method can capture phase structure that require twice the resolution with a polynomial based method. In 6D, this would represent a signifcant savings.

Key words: Semi-Lagrangian methods, WENO schemes, High-order splitting methods, Non-polynomial basis, Vlasov equation, Vlasov-Poisson system

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