Please use this identifier to cite or link to this item:
|Title:||The impact of a vortex ring on a porous screen|
|Citation:||Adhikari, D., Lim, T.T. (2009). The impact of a vortex ring on a porous screen. Fluid Dynamics Research 41 (5) : -. ScholarBank@NUS Repository. https://doi.org/10.1088/0169-5983/41/5/051404|
|Abstract:||In this paper, we re-examine the issue raised by Morton(2000) regarding the impact of a vortex ring on a porous screen. We show, through a systematic experiment, that Morton's observation can only occur at very low Reynolds number or above a certain critical Reynolds number, which is dependent on the porosity of the screen. In particular, we found that a primary vortex ring of moderate Reynolds number impacting a porous screen can also undergo vortex rebound similar to that observed in vortex ring-solid wall interaction. At a higher Reynolds number, the self-induced flow of the primary vortex ring around the axis of symmetry passes through the screen as a jet-like flow, which later regenerates into a new vortex ring of the same sign but weaker circulation. At an even higher Reynolds number, the primary vortex ring has sufficient energy to pass through the screen via a possible mechanism of vortex stretching and reconnection, and continues as a modified ring in its lee. © 2009 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.|
|Source Title:||Fluid Dynamics Research|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 12, 2018
WEB OF SCIENCETM
checked on Dec 4, 2018
checked on Dec 8, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.