کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5776606 1632156 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Parallel finite element variational multiscale algorithms for incompressible flow at high Reynolds numbers
ترجمه فارسی عنوان
الگوریتم های چند متغیره ای عددی موازی محدود برای جریان ناسازگار در اعداد رینولدز بالا
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات محاسباتی
چکیده انگلیسی
Based on two-grid discretizations, some parallel finite element variational multiscale algorithms for the steady incompressible Navier-Stokes equations at high Reynolds numbers are presented and compared. In these algorithms, a stabilized Navier-Stokes system is first solved on a coarse grid, and then corrections are calculated independently on overlapped fine grid subdomains by solving a local stabilized linear problem. The stabilization terms for the coarse and fine grid problems are based on two local Gauss integrations. Error bounds for the approximate solution are estimated. Algorithmic parameter scalings are also derived. The theoretical results show that, with suitable scalings of the algorithmic parameters, these algorithms can yield an optimal rate of convergence. Numerical results are given to verify the theoretical predictions and demonstrate the effectiveness of the proposed algorithms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Numerical Mathematics - Volume 117, July 2017, Pages 1-21
نویسندگان
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