کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
763230 896764 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
How to save a bad element with weak boundary conditions
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
How to save a bad element with weak boundary conditions
چکیده انگلیسی

The P1–P1 finite element pair is known to allow the existence of spurious pressure (surface elevation) modes for the shallow water equations and to be unstable for mixed formulations. We show that this behavior is strongly influenced by the strong or the weak enforcement of the impermeability boundary conditions. A numerical analysis of the Stommel model is performed for both P1–P1 and P1NC–P1 mixed formulations. Steady and transient test cases are considered. We observe that the P1–P1 element exhibits stable discrete solutions with weak boundary conditions or with fully unstructured meshes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 35, Issue 5, June 2006, Pages 477–484
نویسندگان
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