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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Analysis of a new stabilized higher order finite element method for advection-diffusion equations
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Analysis of a new stabilized higher order finite element method for advection-diffusion equations

机译:对流扩散方程的一种新的稳定高阶有限元方法的分析

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摘要

We consider a singularly perturbed advection-diffusion two-point boundary value problem whose solution has a single boundary layer. Based on piecewise polynomial approximations of degree k ≥ 1, a new stabilized finite element method is derived in the framework of a variation multiscale approach. The method coincides with the SUPG method for k = 1 but differs from it for k ≥ 2. Estimates for the error to an appropriate interpolant are given in several norms on different types of meshes. For k = 1 enhanced accuracy is achieved by superconvergence. Postprocessing guarantees the same estimates for the error to the solution itself.
机译:我们考虑奇异摄动对流-扩散两点边值问题,其解只有一个边界层。基于度数k≥1的分段多项式近似,在变分多尺度方法的框架内推导了新的稳定有限元方法。对于k = 1,该方法与SUPG方法相吻合,但对于k≥2,该方法与SUPG方法不同。对于不同类型的网格,在多个范数中给出了适当插值的误差估计。对于k = 1,通过超收敛可以提高精度。后处理保证了解决方案本身对错误的估计。

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