대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2007년도 춘계학술대회B
- /
- Pages.2378-2383
- /
- 2007
후향 계단이 부착된 회전하는 실린더 주위 난류 물질전달의 전산해석
Numerical Study of Turbulent Mass Transfer around a Rotating Stepped Cylinder
초록
Direct Numerical Simulation was carried out to predict mass transfer in turbulent flow around a rotating stepped cylinder. This investigation is a follow-up study of Nesic et al. [Corrosion, Vol. 56, No. 10, pp. 1005 - 1014] The original motivation of this work stemmed from the efforts to design a simple device which can generate flows of high turbulence intensity at low cost for corrosion researchers. Two cases were considered; Sc=1 and 10 both at Re=335. Here, Sc and Re stand for Schmidt number and Reynolds number, respectively, based on the step height and the surface speed of the cylinder upstream the step. Main focus was placed on the correlation between turbulent fluctuation and concentration field. The spatio-temporal evolution of concentration field is discussed. The numerical results are qualitatively compared with those of the experiment conducted with the same flow configuration.
키워드