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On the effect of the dynamic contact angle of a vapor embryo interface trapped in a nucleation site
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute, ASME Press, LCN London Centre for Nanotechnology, UCL University College London, UCL Engineering, the International NanoScience Community, www.nanopaprika.eu.The effect of boiling and cavitation phenomena on nucleation was first experimentally studied.
Results highlight the fact that the "classical" theory of nucleation cannot describe such a configuration. New
theoretical approaches were proposed in order to describe the dynamic effects which occur when the liquid
pressure oscillates over time and when a heat flux imposed to the system. It then appears that the dynamic
and the hysteresis of the contact angle may play a significant role in nucleation by simultaneous boiling and
cavitation effects