The global mode visualization technique presented in Venning et al. [1] is extended to use two cameras, simultaneously recording a 3D cavitating flow from opposite directions. The cavitating flow investigated is that about a sphere at a transcritical Reynolds number of 1.5 × 10⁶ and a cavitation number of 0.8. High-resolution data, in both time and space, allows detailed mode shapes to be obtained. The addition of the second camera significantly reduces the potential for ambiguity about the nature of the shedding modes and adds additional information in regions that would otherwise be obscured in a single-camera experiment. The global distribution of power and the phase for each cavity shedding mode are described, confirming a symmetric and asymmetric mode.

Item Type:	Refereed Conference Paper
Keywords:	modal decomposition, mode visualisation, cavitation, high-speed imaging, frequency analysis
Research Division:	Engineering
Research Group:	Fluid mechanics and thermal engineering
Research Field:	Experimental methods in fluid flow, heat and mass transfer
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in the physical sciences
UTAS Author:	Venning, JA (Dr James Venning)
UTAS Author:	Pearce, BW (Dr Bryce Pearce)
UTAS Author:	Brandner, PA (Professor Paul Brandner)
ID Code:	147897
Year Published:	In Press
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2021-11-22
Last Modified:	2022-09-20
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