کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
518076 867554 2015 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accurate interface normal and curvature estimates on three-dimensional unstructured non-convex polyhedral meshes
ترجمه فارسی عنوان
رابط کاربری نرمال و انحنای دقیق بر روی مش های چند بعدی چند بعدی غیر ساختاری سه بعدی محاسبه می شود
کلمات کلیدی
جریان دو مرحله ای، حجم مایع عملکرد ارتفاع، شبکه غیر ساختاری انحنای، چند ضلعی غیر کانونی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی

This paper presents a framework for extending the height-function technique for the calculation of interface normals and curvatures to unstructured non-convex polyhedral meshes with application to the piecewise-linear interface calculation volume-of-fluid method. The methodology is developed with reference to a collocated node-based finite-volume two-phase flow solver that utilizes the median-dual mesh, requiring a set of data structures and algorithms for non-convex polyhedral operations: truncation of a polyhedron by a plane, intersection of two polyhedra, joining of two convex polyhedra, volume enforcement of a polyhedron by a plane, and volume fraction initialization by a signed-distance function. By leveraging these geometric tools, a geometric interpolation strategy for embedding structured height-function stencils in unstructured meshes is developed. The embedded height-function technique is tested on surfaces with known interface normals and curvatures, namely cylinder, sphere, and ellipsoid. Tests are performed on the median duals of a uniform cartesian mesh, a wedge mesh, and a tetrahedral mesh, and comparisons are made with conventional methods. Across the tests, the embedded height-function technique outperforms contemporary methods and its accuracy approaches the accuracy that the traditional height-function technique exemplifies on uniform cartesian meshes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 300, 1 November 2015, Pages 365–386
نویسندگان
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