A hybrid finite volume/finite element method for incompressible generalized Newtonian fluid flows on unstructured triangular meshes

A hybrid finite volume/finite element method for incompressible generalized Newtonian fluid flows on unstructured triangular meshes
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非结构三角网格上不可压缩广义牛顿流体流动的混合有限体积/有限元方法

DOI:
10.1007/s10409-009-0281-3
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发表时间:
2009-07
影响因子:
3.5
通讯作者:
Gao W.
Gao W.
中科院分区:
工程技术2区
文献类型:
--
作者:
Liu R.X.;Gao W.

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本文提出了一种求解不可压广义牛顿流体(幂律模型)流动的有限体积/有限元混合方法。在非结构三角形网格上采用同位(即非交错)变量布置,速度-压力耦合采用分步投影法。动量方程采用格心有限体积法离散,压力泊松方程采用基于顶点的有限元离散。采用动量插值方法抑制非物理压力波动。数值实验表明,该混合格式在时间和空间上都具有二阶精度。对于牛顿模型和幂律模型的盖驱动空腔和平行壁之间的流动,结果也与已发表的解吻合得很好。
This paper presents a hybrid finite volume/finite element method for the incompressible generalized Newtonian fluid flow (Power-Law model). The collocated (i.e. non-staggered) arrangement of variables is used on the unstructured triangular grids, and a fractional step projection method is applied for the velocity-pressure coupling. The cell-centered finite volume method is employed to discretize the momentum equation and the vertex-based finite element for the pressure Poisson equation. The momentum interpolation method is used to suppress unphysical pressure wiggles. Numerical experiments demonstrate that the current hybrid scheme has second order accuracy in both space and time. Results on flows in the lid-driven cavity and between parallel walls for Newtonian and Power-Law models are also in good agreement with the published solutions.
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影响因子: 7.2
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