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本文以探索发生了粥样硬化病变的动脉血管中的血液流动规律为背景,利用流动可视化技术,从流体力学角度定性研究了局部狭窄刚性管中的振荡流场。发现振荡流场有其独特的特点,其旋涡要强于相应的定常流场,雷诺数、Womersley 数以及管子狭窄形状都对流场有较大影响。该项研究对于认识狭窄管中粘性流场特性,建立相应的物理、数学模型、以及发展流动可视化技术都十分有意义。
In this paper, to explore the occurrence of atherosclerotic arterial blood vessels in the blood flow as the background, the use of flow visualization technology, qualitatively studied from the perspective of fluid mechanics local narrow rigid tube oscillation flow field. It is found that the oscillating flow field has its unique characteristics. The eddy is stronger than the corresponding steady flow field. The Reynolds number, the Womersley number and the narrow shape of the tube all have a great influence on the flow field. This study is of great significance for understanding the characteristics of viscous flow in narrow tubes, establishing corresponding physical and mathematical models, and developing flow visualization techniques.