JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Parametric Study of Instability in Obstructed Channel Flow
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Parametric Study of Instability in Obstructed Channel Flow
Hwang, In-Sang; Yang, Gyeong-Su; Kim, Do-Hyeong;
  PDF(new window)
 Abstract
A Parametric study is numerically carried out for flow fields in a two-dimensional plane channel with thin obstacles(“baffles and blocks”) mounted symmetrically in the vertical direction and periodically in the streamwise direction. The aim of this investigation is to understand how various geometric conditions influence the critical characteristics and pressure drop. A range of BR(the ratio of baffle interval to channel height) between 1 and 5 is considered. Especially when BR is equal to 3, for which the critical Reynolds number turned out to be minimal, we add blocks in the center region in order to study their destabilizing effects on the flows. It is revealed that the critical Reynolds number is further decreased by the presence of the block.
 Keywords
Instability;Hopf Bifurcation;Reattachment;Baffle;Recirculation;
 Language
Korean
 Cited by
 References
1.
황기영, 김홍제, 모정하, 1994, '수직휜이 부착된 평행평판 채널내의 유동 및 열 전달에 관한 수치해석,' 공기조화 냉동공학 논문집, 제7권, 제4호, pp. 642-653

2.
Howes, T., Mackley, M. R., Roberts, E. P. L., 1991, 'The Simulation of Chaotic Mixing and Dispersion for Periodic Flows in Baffled Channels,' Chemical Engineering Science, Vol. 46, No. 7, pp. 1669-1677 crossref(new window)

3.
Cheng, C. H. and Huang, W. H., 1991, 'Numerical Prediction for Laminar Forced Convection in Parallel-plate Channels with Transverse Fin Arrays,' Int. J. Heat Transfer, Vol. 34, No. 11, pp. 2739-2749 crossref(new window)

4.
Roberts, E. P. L., 1994, 'A Numerical and Experimental Study of Transition Process in an Obstructed Channel Flow,' J. Fluid Mech., Vol. 260, pp. 185-209 crossref(new window)

5.
Yang, K. S., 2000, 'Numerical Investigation of Instability and Transition in an Obstructed Channel Flow,' AIAA Journal, Vol. 38, No. 7, pp. 1173-1178

6.
Battaglia, F., Tavener Simon J., Kulkarni, A. K. and Merckle Charles L., 1997, 'Bifurcation of Low Reynolds Number Flows in Symmetric Channels,' AIAA Journal, Vol. 35, No. 1, pp. 99-106

7.
Habib, M. A., Mobarak, A. M., Sallak, M. A., Abdel Hadi E. A. and Affify, R. I., 1994, 'An Experimental Investigation of Heat Transfer and Flow over Baffles of Different Heights,' J. Heat Transfer, Vol. 17, No. 11, pp. 1049-1058

8.
Kim, J. and Moin, P., 1985, 'Application of a Fractional-Step Methods to Incompressible Navier-Stokes Equations,' J. Comp. Physics, Vol. 59, pp. 308-323 crossref(new window)

9.
Berner, C., Durst, F. and McEligot, D. M., 1984, 'Flow Around Baffles,' J. Heat Transfer, Vol. 106, pp. 743-749