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Numerical simulation of two-dimensional viscous flows using combined finite element-immersed boundary method

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Abstract

In this paper, a method that combines the characteristic-based split finite element method (CBS-FEM) and the direct forcing immersed boundary (IB) method is proposed for the simulation of incompressible viscous flows. The structured triangular meshes without regarding the location of the physical boundary of the body is adopted to solve the flow, and the no-slip boundary condition is imposed on the interface. In order to improve the computational efficiency, a grid stretching strategy for the background structured triangular meshes is adopted. The obtained results agree very well with the previous numerical and experimental data. The order of the numerical accuracy is shown to be between 1 and 2. Moreover, the accuracy control by adjusting the number density of the mark points purely at certain stages is explored, and a second power law is obtained. The numerical experiments for the flow around a cylinder behind a backward-facing step show that the location of the cylinder can affect the sizes and the shapes of the corner eddy and the main recirculation region. The proposed method can be applied further to the fluid dynamics with complex geometries, moving boundaries, fluid-structure interactions, etc..

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Authors and Affiliations

  1. Department of Engineering Mechanics, Northwestern Polytechnical University, Xi’an, 710129, China

    Feng-Chao Yang  (杨冯超) & Xiao-peng Chen  (陈效鹏)

Authors
  1. Feng-Chao Yang  (杨冯超)
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  2. Xiao-peng Chen  (陈效鹏)
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Corresponding author

Correspondence to Xiao-peng Chen  (陈效鹏).

Additional information

Project supported by the National High Technology Re- search and Development Program of China (863 Program, Grant No. 2012AA011803), the National Natural Scientific Foundation of China (Grant No. 11172241) and the University Foundation for Fundamental Research of NPU (Grant No. JCY-20130121).

Biography: YANG Feng-chao (1989-), Male, Ph. D. Candidate

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Yang, FC., Chen, Xp. Numerical simulation of two-dimensional viscous flows using combined finite element-immersed boundary method. J Hydrodyn 27, 658–667 (2015). https://doi.org/10.1016/S1001-6058(15)60528-5

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  • DOI: https://doi.org/10.1016/S1001-6058(15)60528-5

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