A novel variational multiscale interpolating element-free Galerkin method for generalized Oseen problems

A novel variational multiscale interpolating element-free Galerkin method for generalized Oseen problems
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解决广义Oseen问题的新型变分多尺度无单元Galerkin插值法

DOI:
10.1016/j.compstruc.2018.08.002
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发表时间:
2018-10
影响因子:
4.7
通讯作者:
Xiaolin Li
Xiaolin Li
中科院分区:
工程技术2区
文献类型:
--
作者:
Tao Zhang;Xiaolin Li

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本文提出了一种新的变分多尺度插值无单元伽辽金(VMIEFG)方法来数值求解广义Oseen问题。利用移动Kriging插值生成具有Kronecker δ函数性质的形函数,从而可以方便、直接地施加本质边界条件。本方法基于将速度及其加权函数分解成粗尺度和细尺度。精细尺度问题得到了解析解,稳定化参数自然出现。然后,粗尺度问题进行了数值求解。VMIEFG方法允许速度和压力的等阶基,从应用的角度来看,这是相当容易实现的。数值例子包括广义Stokes问题、Oseen问题和广义Oseen问题,结果表明了该方法的有效性.
In this paper, a novel variational multiscale interpolating element-free Galerkin (VMIEFG) method is developed for the numerical solution of generalized Oseen problems. The moving Kriging interpolation is used to generate shape functions with Kronecker delta function property, then essential boundary conditions can be enforced easily and directly. The present method is based on a decomposition of the velocity and its weighting function into coarse scales and fine scales. The fine scale problem is solved analytically, and the stabilization parameter appears naturally. Then, the coarse scale problem is solved numerically. The VMIEFG method allows equal-order basis for velocity and pressure, which is fairly easy to implement from an application point of view. Numerical examples involving generalized Stokes problem, Oseen problem and generalized Oseen problem are provided to demonstrate the efficiency of the method.
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发表时间: 2004-02
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