کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
762753 896711 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Continuous elliptic and multi-dimensional hyperbolic Darcy-flux finite-volume methods
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Continuous elliptic and multi-dimensional hyperbolic Darcy-flux finite-volume methods
چکیده انگلیسی

Elliptic and hyperbolic Darcy-flux approximations are presented. Families of flux-continuous finite-volume methods are investigated for the elliptic full-tensor pressure equation with general discontinuous coefficients. Full pressure continuity across control-volume interfaces is built into the methods leading to an important distinction from the earlier pointwise continuous methods. The families of quasi-positive methods significantly reduce spurious oscillations (induced by earlier schemes) in discrete pressure solutions for strongly anisotropic full-tensor fields. Anisotropy favoring triangulation and non-linear flux splitting are also shown to be effective for computing solutions free of spurious oscillations.Multi-dimensional upwind schemes that reduce cross-wind numerical diffusion induced by the standard upwind scheme are also presented for hyperbolic Darcy-flux approximation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 46, Issue 1, July 2011, Pages 12–22
نویسندگان
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