Communications on Applied Mathematics and Computation ›› 2024, Vol. 6 ›› Issue (1): 325-339.doi: 10.1007/s42967-023-00249-x

• ORIGINAL PAPERS • Previous Articles     Next Articles

High Order IMEX Stochastic Galerkin Schemes for Linear Transport Equation with Random Inputs and Diffusive Scalings

Zheng Chen1, Lin Mu2   

  1. 1. Department of Mathematics, University of Massachusetts Dartmouth, 285 Old Westport Road, Dartmouth, 02747, MA, USA;
    2. Department of Mathematics, University of Georgia, Athens, 30602, GA, USA
  • Received:2022-07-20 Revised:2022-12-16 Published:2024-04-16
  • Contact: Zheng Chen,E-mail:zchen2@umassd.edu;Lin Mu,E-mail:linmu@uga.edu E-mail:zchen2@umassd.edu;linmu@uga.edu
  • Supported by:
    Mu is partially supported by the Simons Foundation: Collaboration Grants. Chen is partially supported by the AFOSR grant FA9550-18-1-0383.

Abstract: In this paper, we consider the high order method for solving the linear transport equations under diffusive scaling and with random inputs. To tackle the randomness in the problem, the stochastic Galerkin method of the generalized polynomial chaos approach has been employed. Besides, the high order implicit-explicit scheme under the micro-macro decomposition framework and the discontinuous Galerkin method have been employed. We provide several numerical experiments to validate the accuracy and the stochastic asymptotic-preserving property.

Key words: Stochastic Galerkin scheme, linear transport equations, generalized polynomial approach, stochastic asymptotic-preserving property