Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Bokai Yan"'
Publikováno v:
SIAM Journal on Scientific Computing. 41:A422-A451
We design an asymptotic preserving (AP) scheme for the linear kinetic equation with anisotropic scattering that leads to a fractional diffusion limit. This limit may be attributed to two reasons: a...
Publikováno v:
Journal of Computational Physics. 346:480-496
Kinetic simulation of plasmas with detailed excitation and ionization collisions presents a significant computational challenge due to the multiscale feature of the collisional rates. In the present work, we propose a complexity reduction method base
Publikováno v:
Journal of Computational Physics. 312:157-174
We present a new asymptotic-preserving scheme for the linear Boltzmann equation which, under appropriate scaling, leads to a fractional diffusion limit. Our scheme rests on novel micro-macro decomposition to the distribution function, which splits th
Autor:
Russel E. Caflisch, Bokai Yan
Publikováno v:
Journal of Computational Physics. 298:711-740
In this work we propose a novel negative particle method for the general bilinear collision operators in the spatial homogeneous case and apply it to Coulomb collisions. This new method successfully reduces the growth of particle numbers from the num
Publikováno v:
Journal of Computational Physics. 299:747-786
This paper describes a kinetic model and a corresponding Monte Carlo simulation method for excitation/deexcitation and ionization/recombination by electron impact in a plasma free of external fields. The atoms and ions in the plasma are represented b
We propose a new class of asymptotic preserving schemes to solve kinetic equations with mono-kinetic singular limit. The main idea to deal with the singularity is to transform the equations by appropriate scalings in velocity. In particular, we study
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b1b77f88f482addc76fb400f87b7468
Publikováno v:
International Journal for Numerical Methods in Fluids. 75:81-102
SUMMARY We are concerned with a coupled system describing the interaction between suspended particles and a dense fluid. The particles are modeled by a kinetic equation of Vlasov–Fokker–Planck type, and the fluid is described by the incompressibl
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)
Abstract In this study, the enrichment factor (EF) and pollution load index (PLI) were used to evaluate the pollution of potential toxic elements (PTEs) in the soil near the oil production plants in central China, and the potential ecological risk (P
Externí odkaz:
https://doaj.org/article/2bebf0f0c4ea4227992edf938dacf6cd
Publikováno v:
Journal of Computational Physics. 246:145-164
We consider a system coupling the incompressible Navier–Stokes equations to the Vlasov–Fokker–Planck equation. Such a problem arises in the description of particulate flows. We design a numerical scheme to simulate the behavior of the system. T
Publikováno v:
SIAM Journal on Scientific Computing. 35:A150-A172
We propose an asymptotic-preserving (AP) scheme for kinetic equations that is efficient also in the hydrodynamic regimes. This scheme is based on the Bhantnagar--Gross--Krook (BGK) penalty method introduced by Filbet and Jin [J. Comput. Phys., 229 (2