A comparative study between partitioned and monolithic methods for the problems with 3D fluid-structure interaction of blood vessels

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• 作者：Sang Truong Ha ; Long Cu Ngo ; Muhammad Saeed…
• 关键词：Blood flows ; Finite element method ; Fluid ; structure interaction ; Monolithic ; Partitioned
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：31
• 期：1
• 页码：281-287
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering; Vibration, Dynamical Systems, Control; Industrial and Production Engineering;
• 出版者：Korean Society of Steel Construction
• ISSN：1976-3824
• 卷排序：31

文摘

The problem with Fluid structure interaction (FSI) can be simulated by monolithic (fluid and structured equations are solved in a single monolithic matrix) or partitioned approach (fluid and solid equations are sequentially solved, and coupling is achieved subsequently through iteration). This paper presents a comparative study between monolithic (in-house) and partitioned (ANSYS) methods for 3D FSI problems. Pressure wave propagation in a flexible tube and a pulsatile flow interacting with a mild stenotic vessel are used in this study. The present numerical experiment reveals that the monolithic approach produced better convergence behavior and consumed lower CPU time than the partitioned method for the selected 3D FSI problems. Furthermore, the partitioned method had a severe convergence problem during strong interaction of fluid and structure.