PIV study on the interaction of triple transitional round fountains in a homogeneous fluid
Conference Publication ResearchOnline@JCUAbstract
This paper investigates experimentally the transient behavior of the interaction of triple transitional fountains injected from three round sources into a homogeneous fluid using the PIV technique over the Reynolds and Froude numbers in the ranges 100<=Re<=1000 and 1<=Fr<=10. The results show that the behavior of the interaction can be categorized into several distinct regimes: (a) Flapping steady regime, where the flow in the interaction region sways horizontally initially but soon becomes stable with no fluctuation in the interaction height and negligible horizontal sway; (b) Bobbing-flapping steady regime, where the interaction region bobs initially with a repeated up-and-down height and three-dimensional horizontal swaying behaviour, but at full development, the interaction becomes steady; (c) Flapping unsteady and bobbing-flapping unsteady regimes, where the behaviours of steady and unsteady interactions are quite similar with the exception that, in the unsteady regime, the interaction remains unsteady even at full development, with fluctuating maximum interaction height and continual swaying; and (d) Transitional/turbulent unsteady regime, where the interaction demonstrates strong unsteadiness and oscillating behavior starting from the beginning. All these observed characteristics are also mapped into a Re-Fr diagram.
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18th Australasian Fluid Mechanics Conference
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978-0-646-58373-0
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4
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Launceston, Tasmania, Australia
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Australasian Fluid Mechanics Society
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Launceston, Tasmania, Australia
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