Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/51632
Title: On the occurrence of asymmetric flow within a circular concavity
Authors: New, T.H. 
Lim, T.T. 
Issue Date: 2004
Source: New, T.H.,Lim, T.T. (2004). On the occurrence of asymmetric flow within a circular concavity. AIAA Paper : 10347-10357. ScholarBank@NUS Repository.
Abstract: An experimental study has been carried out on a flow past a circular concavity embedded on a flat surface. Flow visualization using conventional point dye-injection of coloured dye was performed at various concavity depth-to-diameter ratios with Reynolds numbers ranging from 1500 to 6000. The results showed that, depending on exact Reynolds number of the flow and the depth-to-diameter ratio, the normally anticipated symmetric recirculating flow state within the concavity might not be sustainable. Instead, the flow state was observed to transit to an asymmetric one with a dominant vortex formed diagonally across the concavity. The presence of the vortex also seemed to lead to enhanced mass transport into and across the concavity. Reynolds number was found to be the driving factor behind the various major flow states occurring within the circular concavity, as the transition between the flow states remained almost invariant for the concavity depth-to-diameter ratios for this study.
Source Title: AIAA Paper
URI: http://scholarbank.nus.edu.sg/handle/10635/51632
Appears in Collections:Staff Publications

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