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Volume 21, Issue 3
Solving Vlasov-Poisson-Fokker-Planck Equations Using $NRxx$ method

Yanli Wang & Shudao Zhang

DOI: 10.4208/cicp.220415.080816a

Commun. Comput. Phys., 21 (2017), pp. 782-807.

Published online: 2018-04

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  • Abstract

We present a numerical method to solve the Vlasov-Poisson-Fokker-Planck (VPFP) system using the $NRxx$ method proposed in [4, 7, 9]. A globally hyperbolic moment system similar to that in [23] is derived. In this system, the Fokker-Planck (FP) operator term is reduced into the linear combination of the moment coefficients, which can be solved analytically under proper truncation. The non-splitting method, which can keep mass conservation and the balance law of the total momentum, is used to solve the whole system. A numerical problem for the VPFP system with an analytic solution is presented to indicate the spectral convergence with the moment number and the linear convergence with the grid size. Two more numerical experiments are tested to demonstrate the stability and accuracy of the $NRxx$ method when applied to the VPFP system.

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@Article{CiCP-21-782, author = {Yanli Wang and Shudao Zhang}, title = {Solving Vlasov-Poisson-Fokker-Planck Equations Using $NRxx$ method}, journal = {Communications in Computational Physics}, year = {2018}, volume = {21}, number = {3}, pages = {782--807}, abstract = {

We present a numerical method to solve the Vlasov-Poisson-Fokker-Planck (VPFP) system using the $NRxx$ method proposed in [4, 7, 9]. A globally hyperbolic moment system similar to that in [23] is derived. In this system, the Fokker-Planck (FP) operator term is reduced into the linear combination of the moment coefficients, which can be solved analytically under proper truncation. The non-splitting method, which can keep mass conservation and the balance law of the total momentum, is used to solve the whole system. A numerical problem for the VPFP system with an analytic solution is presented to indicate the spectral convergence with the moment number and the linear convergence with the grid size. Two more numerical experiments are tested to demonstrate the stability and accuracy of the $NRxx$ method when applied to the VPFP system.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.220415.080816a}, url = {http://global-sci.org/intro/article_detail/cicp/11260.html} }
TY - JOUR T1 - Solving Vlasov-Poisson-Fokker-Planck Equations Using $NRxx$ method AU - Yanli Wang & Shudao Zhang JO - Communications in Computational Physics VL - 3 SP - 782 EP - 807 PY - 2018 DA - 2018/04 SN - 21 DO - http://doi.org/10.4208/cicp.220415.080816a UR - https://global-sci.org/intro/article_detail/cicp/11260.html KW - AB -

We present a numerical method to solve the Vlasov-Poisson-Fokker-Planck (VPFP) system using the $NRxx$ method proposed in [4, 7, 9]. A globally hyperbolic moment system similar to that in [23] is derived. In this system, the Fokker-Planck (FP) operator term is reduced into the linear combination of the moment coefficients, which can be solved analytically under proper truncation. The non-splitting method, which can keep mass conservation and the balance law of the total momentum, is used to solve the whole system. A numerical problem for the VPFP system with an analytic solution is presented to indicate the spectral convergence with the moment number and the linear convergence with the grid size. Two more numerical experiments are tested to demonstrate the stability and accuracy of the $NRxx$ method when applied to the VPFP system.

Yanli Wang and Shudao Zhang. (2018). Solving Vlasov-Poisson-Fokker-Planck Equations Using $NRxx$ method. Communications in Computational Physics. 21 (3). 782-807. doi:10.4208/cicp.220415.080816a
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