Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session G09: Bubbles: Growth, Heat Transfer and Boiling II
10:35 AM–12:45 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B214
Chair: Alexander Yarin, University of Illinois, Chicago
Abstract ID: BAPS.2018.DFD.G09.1
Abstract: G09.00001 : Boiling on a Wire Heater: Exponential Vaporization Fronts and Vibrations*
10:35 AM–10:48 AM
Presenter:
Christopher Staszel
(Univ of Illinois - Chicago)
Authors:
Christopher Staszel
(Univ of Illinois - Chicago)
Alexander L Yarin
(Univ of Illinois - Chicago)
Vapor bubble nucleation on thin strip heaters is explored theoretically and experimentally. Vibrations of the heating surface due to nucleate boiling is also studied theoretically and experimentally. The fundamental phenomena resulting in subcooled boiling-induced vibration (SBIV) is demonstrated to be intrinsically related to the entrained liquid circulation driven by vapor bubble nucleation. In the case of high heat fluxes at the heater, vaporization fronts occur along the thin strip heaters leading to a sudden and violent transition to film boiling. The resulting vaporization front propagation along the heater was studied experimentally and shown to exponentially increase in time, contrary to the prior views of linear propagation. A theoretical description of this new phenomenon, the vaporization fronts, is given and confirmed experimentally. The theory has also provided an explanation and description of the critical heat flux (CHF) and film boiling inception.
*The authors are grateful to NASA for the support of this work through the Grant No. NNX17AF33G.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.G09.1
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