Liu, Tao, Lin, Wenxian, Gao, Wenfeng, and Armfield, Steven W. (2012) Onset asymmetry and three-dimensionality in transitional round fountains in homogeneous fluid. In: Proceedings of the 23rd International Congress of Theoretical and Applied Mechanics. FM05-003. pp. 1-2. From: ICTAM 2012: 23rd International Congress of Theoretical and Applied Mechanics, 19-24 August 2012, Beijing, China.

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Abstract

The onset of entrainment and asymmetry, which occurs in transitional fountains with intermediate Fr and Re (1 < Fr < 10, 100 < Re < 1000), is the key to shed light on the turbulence generation mechanism in fountains. In this study, a series of direct numerical simulations (DNS) are carried out for transitional fountains in the ranges of 0.1⩽Fr⩽8, 10⩽Re⩽2000 to study the onset of asymmetry and three-dimensionality of these fountains. The results show that fountains at a specific Fr values with Re > 150 and at a specific Re value with Fr > 0.5 are asymmetric and three-dimensional and the extents of their asymmetry and three-dimensionality strongly depends on Re and Fr respectively.

Item ID:	24261
Item Type:	Conference Item (Research - E1)
Keywords:	transitional fountain; asymmetry; entrainment; direct numerical simulation; critical Reynolds number; critical Froude number
Related URLs:	Organisation
Funders:	National Natural Science Foundation of China, Natural Science Foundation of Yunnan Province, China, Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China, Australian Research Council (ARC)
Date Deposited:	01 Apr 2014 01:44
FoR Codes:	09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 100%
SEO Codes:	97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 100%
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