کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4637751 1631980 2017 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonconforming generalized multiscale finite element methods
ترجمه فارسی عنوان
روش غیر عادی متداول عناصر محدود عددی فراگیر
کلمات کلیدی
تعمیم روش المان محدود چند مقیاسی؛ روش نامنطبق؛ رسانه های بسیار ناهمگن؛ بیش از حد نمونه برداری
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
چکیده انگلیسی


• We propose a framework for the nonconforming generalized multiscale methods with explicit steps concretely given to illustrate our methodology.
• Our approach is simple and noble in the sense that it is free of parameters which are essential in other existing discontinuous Galerkin methods.
• Oversampling ideas enhance approximation quality of our approach.
• Our method performs well to resolve highly heterogeneous media.
• We provide several numerical examples to confirm the efficiency of the proposed method.

A framework is introduced for nonconforming multiscale approach based on GMsFEM (Generalized Multiscale Finite Element Method). Snapshot spaces are constructed for each macro-scale block. The snapshot spaces can be based on either conforming or nonconforming elements. With suitable dimension reduction, offline spaces are constructed. Moment function spaces are then introduced to impose continuity among the local offline spaces, which results in nonconforming GMsFE spaces. Oversampling and randomized boundary condition strategies are considered. Steps for the nonconforming GMsFEM are given explicitly. Error estimates are derived. Numerical results are presented to support the efficiency of the proposed approach.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational and Applied Mathematics - Volume 311, February 2017, Pages 215–229
نویسندگان
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