非対称狭さく部を通る脈動流における渦の共振現象

概要

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It is well known that fluid dynamical phenomena in arterial blood flow can play an important role in arterial diseases. Flow between flat plates with asymmetric stenosis is analyzed numerically. The fluid is assumed to be Newtonian and incompressible, and the flow is assumed to be periodic in time. It is found that the vortex downstream of asymmetric stenosis becomes strongest at a certain frequency of pulsation. This phenomenon is called vortex resonance in this paper. The flow pattern, the vortex strength and the distributions of wall shear stress are obtained. The results show that the resonance frequency changes with wall configuration and Reynolds number. The vortex resonance occurs where the difference between the adverse pressure and the friction on the wall is maximum.
一般社団法人日本機械学会の論文
1999-11-25