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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.19 No.1
- 발행연도
- 2005.1
- 수록면
- 199 - 208 (10page)
이용수
초록· 키워드
오류제보하기
In this study a newly designed microchannel as an efficient fluid-mixer is proposed. This design is comprised of a channel and a series of blocks periodically attached on the bottom surface of the channel. In this configuration, the stirring is greatly enhanced at a certain range of parametric values. To characterize the flow field and the stirring effect, both numerical and experimental methods were employed. To obtain the velocity field, three-dimensional numerical computation to the Navier Stokes equations was performed by using a commercial code, FLUENT 6.0. The fluid-flow solutions were then cast into studying the characteristics of stirring with the aid of Lyapunov exponent. In this study. the Lyapunov exponents were computed manually because the commercial code does not provide the corresponding tool. In the experiment, flow visualization was performed by using pure glycerin in a tank and glycerin mixed with small amount of a fluorescent dye in the other tank. The numerical results show that the pattern of the particles' trajectories in the microchannel heavily depends on the block arrangement. It was shown that the stirring is significantly enhanced by a larger block-height and reaches maximum when the height is 0.8 times the channel width. We also studied the effect of the block stagger angle. It was found that stirring performance is the best at the block stagger angle of 45°.
목차
Abstract
1. Introduction
2. Flow Model and Numerical/Experimental Methods
3. Results and Discussion
4. Conclusions
Acknowledgments
References
참고문헌 (10)
참고문헌 신청
Aref, H., 2002, "The Development of Chaotic Advection," Phys. Fluids, Vol.14, No.4, pp.1315~1325.
Gad-el-Hak, M., 2002, The MEMS Handbook. CRC Press, New York.
Kim, Y.J. and Kim, T.A., 2004, "A Study on the Plane Couette Flow Using Micropolar Fluid Theory," KSME (Int.), Vol.18, No.3, pp.491~498.
Mala, G.M. and Li, D., 1999, "Flow Characteristics of Water in Microtubes," Int. J. Heat and Fluid Flow, Vol.20, pp.142~148.
Meinhart, C.C., Wereley. S.T. and Santiago, J.G., 1999, "PIV Measurements of a Microchannel Flow," Exp. Fluids, Vol.27, pp.417~419.
Gad-el-Hak, M., 2002, The MEMS Handbook. CRC Press, New York.
Kim, Y.J. and Kim, T.A., 2004, "A Study on the Plane Couette Flow Using Micropolar Fluid Theory," KSME (Int.), Vol.18, No.3, pp.491~498.
Mala, G.M. and Li, D., 1999, "Flow Characteristics of Water in Microtubes," Int. J. Heat and Fluid Flow, Vol.20, pp.142~148.
Meinhart, C.C., Wereley. S.T. and Santiago, J.G., 1999, "PIV Measurements of a Microchannel Flow," Exp. Fluids, Vol.27, pp.417~419.
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