کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
497609 862929 2016 36 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitsche-XFEM for the coupling of an incompressible fluid with immersed thin-walled structures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Nitsche-XFEM for the coupling of an incompressible fluid with immersed thin-walled structures
چکیده انگلیسی

In this paper we introduce a Nitsche-XFEM method for fluid–structure interaction problems involving a thin-walled elastic structure (Lagrangian formalism) immersed in an incompressible viscous fluid (Eulerian formalism). The fluid domain is discretized with an unstructured mesh not fitted to the solid mid-surface mesh. Weak and strong discontinuities across the interface are allowed for the velocity and pressure, respectively. The fluid–solid coupling is enforced consistently using a variant of Nitsche’s method with cut-elements. Robustness with respect to arbitrary interface intersections is guaranteed through suitable stabilization. Several coupling schemes with different degrees of fluid–solid time splitting (implicit, semi-implicit and explicit) are investigated. A series of numerical test in 2D, involving static and moving interfaces, illustrates the performance of the different methods proposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 301, 1 April 2016, Pages 300–335
نویسندگان
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