점탄성 유체의 난류 해석을 위한 수정된 k-ε 난류모델 개발 및 혈류역학에의 적용

Abstract

This article describes the numerical investigation of turbulent blood flow in the stenosed artery bifurcation under periodic acceleration of the human body. Numerical analyses for turbulent blood flow were performed with different magnitude of periodic accelerations using a modified turbulence model which was considering drag reduction of non-Newtonian fluid. The blood was considered to be a non-Newtonian fluid which was based on the power-law viscosity. In order to validate the modified k-ε model, numerical simulations were compared with the standard k-ε model and the Malin's low Reynolds number turbulence model for power-law fluid. As results, the modified k-ε model represents intermediate characteristics between laminar and standard k-ε model, and the modified k-ε model showed good agreements with Malin’s verified power law model. Moreover, the computing time and computer resource of the modified k-ε model were reduced about one third than low Reynolds number model including Malin’s model.