کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
522706 867846 2007 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extrinsic meshfree approximation using asymptotic expansion for interfacial discontinuity of derivative
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Extrinsic meshfree approximation using asymptotic expansion for interfacial discontinuity of derivative
چکیده انگلیسی

A sharp meshfree approximation for derivative discontinuities across arbitrary interfaces is proposed. The interface can be arbitrarily located in a domain in which nodes are distributed uniformly or irregularly. The proposed meshfree approximations consist of two parts, singular and regular. The moving least square meshfree approximation is used together with the local wedge function as basis functions. The approximations for discontinuities are applied in a meshfree point collocation method to obtain solutions of the Poisson problem with a layer delta source on the interface and second order elliptic problems with discontinuous coefficients and/or the singular layer sources along the interface. The numerical calculations show that this method has good performance even on irregular node models.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 221, Issue 1, 20 January 2007, Pages 370–394
نویسندگان
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