Fourth-order accurate fractional-step IMEX schemes for the incompressible Navier–Stokes equations on moving overlapping grids
Fourth-order accurate fractional-step IMEX schemes for the incompressible Navier–Stokes equations on moving overlapping grids
复制标题
移动重叠网格上不可压缩纳维斯托克斯方程的四阶精确分数阶 IMEX 方案
DOI:
10.1016/j.cma.2020.113040
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发表时间:
2020
影响因子:
7.2
通讯作者:
Schwendeman, D.W.
中科院分区:
文献类型:
--
作者:
Meng, F.;Banks, J.W.;Henshaw, W.D.;Schwendeman, D.W.
Two efficient fractional-step schemes for the incompressible Navier–Stokes equations in two and three dimensions are described. The schemes are fourth-order accurate in space and time, and are based on solving the velocity-pressure form of the equations. Both schemes employ predictor-corrector time-stepping approaches. The first is an explicit Adams-type scheme, while the second is an IMEX-BDF-type scheme in which the viscous/advective terms in the equations are treated implicitly/explicitly. The equations and boundary conditions are discretized in space using fourth-order accurate finite-difference approximations. The formulation of discrete boundary conditions for each stage of the fractional-step scheme is found to be critical to the accuracy and stability of the approach. A WENO-based scheme, called BWENO, provides upwind dissipation and ensures robustness of the schemes for problems where the solution is under-resolved on the grid (e.g. near boundary or shear layers). Complex, and possibly moving, domains are handled efficiently using composite overlapping grids. A variety of problems in two and three dimensions, some for which exact solutions are either known or manufactured, are used to verify the stability and accuracy of the new schemes.
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DOI:
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发表时间:
2012-03
期刊:
--
影响因子:
--
作者:
Alan Sussman
通讯作者:
Alan Sussman
DOI:
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1989
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--
作者:
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1995
期刊:
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--
作者:
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通讯作者:
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DOI:
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发表时间:
2016
期刊:
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作者:
O. Colomés;S. Badia
通讯作者:
S. Badia
影响因子:
1.8
作者:
Kronbichler
通讯作者:
Kronbichler