비 뉴우톤 유체 유동해석을 위한 전산유체역학적 접근해석 = Computational Fluid Dynamics Approach for Flow Problems of Non-Newtonian Fluid

다국어 초록 (Multilingual Abstract)

The purpose of this paper is to apply the numerical simulation techniques the internal flow problems of Non-Newtonian fluids. Rheologically different fluids such as water, aqueous carbopol solutions, aqueous separan solutions and blood are employed for the numerical approach to understand flow phenomena in the stenotic tubes and the bifurcated tubes. Mathematical formulation of rheological properties for the non-Newtonian fluids are obtained by a function of the shear rate using the modified power law model, the Carreau model.
The modified cross model and the modified Powell-Eyring model the results numerical application to the internal flow problems are as follows : (1) The numerical results for the non-Newtonian fluids in the stenosed tubes and bifurcated tubes are in good agreement with the experiments. (2) The proposed modified power law model is proper to describe the rheological behaviors of the non-Newtonian fluids. (3) Some differences in flow behaviors of Newtonian and non-Newtonian fluids are observed. (4) The pressure loss coefficient in the stenotic tubes can be determined by numerical methods.