A finite element analysis on fluid motion in librating triaxial ellipsoids

A finite element analysis on fluid motion in librating triaxial ellipsoids
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动动三轴椭球体中流体运动的有限元分析

DOI:
10.1002/num.21833
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发表时间:
2014-09
影响因子:
3.9
通讯作者:
Zou Jun
Zou Jun
中科院分区:
数学3区
文献类型:
--
作者:
Chan Kit H.;He Yinnian;Zhang Keke;Zou Jun

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行星振动驱动的流体运动可能在维持热或化学非对流同步行星和卫星的磁性方面发挥关键作用。我们提出了一种三轴椭球域上的完全离散有限元方法,用于模拟纬向振动三轴椭球腔中的三维非线性流动,由于非球面几何形状,通常的极向环面分解的伪谱方法很难模拟。研究了两种不同时间格式的瞬态有限元解的稳定性,并建立了它们的最优阶误差估计。对二阶隐式格式进行了相应的数值模拟,深入了解了所提出的有限元方法的实际情况。 © 2013 Wiley periodicals, Inc. 数值方法偏微分方程 30: 1518–1537, 2014
Fluid motion driven by planetary libration may play a key role in maintaining the magnetism of synchronous planets and moons that are thermally or chemically nonconvective. We present a fully discrete finite element method on a triaxial ellipsoidal domain for simulating a three‐dimensional nonlinear flow in a latitudinally librating triaxial ellipsoidal cavity, for which the usual pseudospectral method with the poloidal‐toroidal decomposition is difficult because of nonspherical geometry. Stability of the time‐dependent finite element solutions with two different temporal schemes are studied, and their error estimates of optimal order are established. The corresponding numerical simulation is implemented for the second‐order implicit scheme, offering an insight into the practical aspect of the proposed finite element method. © 2013 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 30: 1518–1537, 2014
DOI: 10.1093/imanum/23.4.665
发表时间: 2003-10-01
影响因子: 2.1
作者:
He, YN
通讯作者: He, YN
DOI: 10.1002/zamm.19800600811
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