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首页> 外文期刊>Journal of Biomechanics >Fluid-structure interaction in a pulmonary arterial bifurcation.
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Fluid-structure interaction in a pulmonary arterial bifurcation.

机译:肺动脉分叉中的流固耦合。

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摘要

A numerical method is developed to solve the fluid-structure interaction in three-dimensional pulmonary arterial bifurcation with collapsible tubes. A self-developed FEM code is used to calculate the nonlinear deformation of the thin-walled structure and a commercial CFD solver, FLUENT, is used to resolve the fluid flow. The large deformation of the structure alters the flow field significantly while the fluid pressure affects the deformation of the structure strongly. In the bifurcation branches, the relatively short tube collapses into wave number N=3 mode. The strong collapse of the branch tube leads to a large contraction of the cross-sectional area and increases the resistance on the fluid flow. The recirculation occurs at both the up- and down-stream of the collapsed tube.
机译:开发了一种数值方法来解决可折叠管在三维肺动脉分叉中的流固耦合。自行开发的FEM代码用于计算薄壁结构的非线性变形,而商用CFD求解器FLUENT用于解决流体流动。结构的大变形显着改变了流场,而流体压力强烈地影响了结构的变形。在分叉分支中,相对短的管塌陷成波数N = 3模式。支管的强烈塌陷导致横截面积大收缩,并增加了流体流动的阻力。再循环发生在折叠管的上游和下游。

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