Polygonal type variable-node elements by means of the smoothed finite element method for analysis of two-dimensional fluid-solid interaction problems in viscous incompressible flows

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A cell-based smoothed finite element method is proposed to make a polygonal type variable-node element for analyzing two-dimensional FSI problems. The gradient smoothing technique for the velocity field provides a proper softening effect, which relieves the stiff behavior of the conventional FEM. In addition, by using polygonal elements, a seamless connection is achieved between non-matching meshes satisfying the interface conditions of continuity and compatibility. In order to prevent mesh distortion along the fluid-solid interface, a sliding polygonal mesh was developed using the cell-based smoothed finite element method. Some numerical examples were presented to assess the performance and the effectiveness of the present method. The smoothed finite element methods yielded better accuracy compared with the conventional FEM, and the sliding polygonal mesh method successfully treated mesh distortion. (C) 2017 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2017-04
Language
English
Article Type
Article
Keywords

SLIDING MESH TECHNIQUE; METHOD ES-FEM; METHOD NS-FEM; NONMATCHING MESHES; MECHANICS PROBLEMS; DYNAMIC-ANALYSIS; SIMULATION; INTERFACES; SCHEME; LOAD

Citation

COMPUTERS & STRUCTURES, v.182, pp.475 - 490

ISSN
0045-7949
DOI
10.1016/j.compstruc.2017.01.006
URI
http://hdl.handle.net/10203/223416
Appears in Collection
ME-Journal Papers(저널논문)
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