کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
512692 866421 2014 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Natural convection heat transfer at high Rayleigh numbers – Extended meshless local Petrov–Galerkin (MLPG) primitive variable method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Natural convection heat transfer at high Rayleigh numbers – Extended meshless local Petrov–Galerkin (MLPG) primitive variable method
چکیده انگلیسی

The meshless local Petrov–Galerkin (MLPG) method is extended using an improved primitive variable formulation to solve the two-dimensional laminar natural convection equations. The extended method solves the natural convection heat transfer problems at high Rayleigh numbers. The method uses the fractional step scheme for discretization, and the moving least square (MLS) interpolation for approximation of the field variables. For the proposed technique, a weighting function of unity is used. The improved method considers the natural convection in a square cavity for up to and including Ra=108Ra=108, in a concentric square outer cylinder and circular inner cylinder annulus for up to and including Ra=107Ra=107, and in a two concentric circular cylinders annulus for up to and including Ra=105Ra=105. Comparing the results of the three test cases obtained using the present method with those obtained using the conventional methods shows very good agreement existing among the appropriate results, hence, verifying the proposed improved meshless numerical technique.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Analysis with Boundary Elements - Volume 44, July 2014, Pages 170–184
نویسندگان
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