期刊
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
卷 272, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnnfm.2019.104162
关键词
Cell-based smoothed finite element method; CS-FEM; Characteristic-based split; Viscoelastic fluid; Oldroyd-B
类别
资金
- Natural Science Foundation of Shanghai [19ZR1437200]
- National Natural Science Foundation of China [51508332]
In this paper, a cell-based smoothed finite element method (CS-FEM) incorporating characteristic-based split (CBS) scheme is developed to compute viscoelastic fluid flow. The system of the Navier-Stokes and Oldroyd-B constitutive equations is decoupled in tandem with equal low-order approximation of the triple primitive variables. The spatial discretization is based upon CS-FEM which readily smooths all gradient-related entries of the governing equations over bilinear four-node quadrilateral elements. Moreover, the cell-based smoothing concept is applied to evaluation of viscoelastic fluid force. Four benchmark problems are replicated to demonstrate the applicability and robustness of the smoothed CBS finite element formulation. A good agreement is exposed between the present and previous results.
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