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A conservative nonlocal convection–diffusion model and asymptotically compatible finite difference discretization

Journal Article · · Computer Methods in Applied Mechanics and Engineering
 [1];  [2];  [3]
  1. Ocean University of China, Qingdao (China); DOE/OSTI
  2. University of South Carolina, Columbia, SC (United States)
  3. Columbia University, New York, NY (United States)
Here in this paper, we first propose a nonlocal convection–diffusion model, in which the convection term is constructed in a special upwind manner so that mass conservation and maximum principle are maintained in any space dimension. The well-posedness of the proposed nonlocal model and its convergence to the classical local convection–diffusion model are established. A quadrature-based finite difference discretization is then developed to numerically solve the nonlocal problem and it is shown to be consistent and unconditionally stable. We further demonstrate that the numerical scheme is asymptotically compatible, that is, the approximate solutions converge to the exact solution of the corresponding local problem when δ → 0 and h → 0. Numerical experiments are also performed to complement the theoretical analysis.
Research Organization:
University of South Carolina, Columbia, SC (United States)
Sponsoring Organization:
Air Force Office of Scientific Research (AFOSR); Army Research Office (ARO); Central Universities; National Science Foundation (NSF); USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0008087; SC0016540
OSTI ID:
1533652
Alternate ID(s):
OSTI ID: 1550578
Journal Information:
Computer Methods in Applied Mechanics and Engineering, Journal Name: Computer Methods in Applied Mechanics and Engineering Journal Issue: C Vol. 320; ISSN 0045-7825
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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