Please use this identifier to cite or link to this item:
|Title:||Vortex breakdown in an enclosed cylinder with a partially rotating bottom-wall|
|Authors:||Yu, P. |
|Citation:||Yu, P., Lee, T.S., Zeng, Y., Low, H.T. (2008-11). Vortex breakdown in an enclosed cylinder with a partially rotating bottom-wall. Journal of Fluids Engineering, Transactions of the ASME 130 (11) : 1111011-11110112. ScholarBank@NUS Repository. https://doi.org/10.1115/1.2969427|
|Abstract:||A numerical study of the axisymmetric flow in a cylindrical chamber of height H is presented, which is driven by a bottom disk rotating at angular velocityΩ. However, unlike most previous studies, the present rotating disk is of smaller radius than the bottom-wall. The boundary curves for the onset of vortex breakdown are presented using different definitions of the nondimensional parameters, depending on whether the cylinder radius R or the disk radius rd is used as the length scale. The study shows that the boundary curves are best correlated when presented in terms of the Reynolds number Ωrd 2/v, aspect ratio H/R, and cylinder-to-disk ratio R/rd. The cylinder-to-disk ratio R/r d up to 1.6 is found to have noticeable effect on vortex breakdown; this is attributed to the change of effective aspect ratio. The contours of streamline, angular momentum, and azimuthal vorticity are presented and compared with those of whole bottom-wall rotation. Copyright © 2008 by ASME.|
|Source Title:||Journal of Fluids Engineering, Transactions of the ASME|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 19, 2018
WEB OF SCIENCETM
checked on Sep 10, 2018
checked on Jul 6, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.