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dc.contributor.authorWang, HS-
dc.contributor.authorRose, JW-
dc.contributor.author2nd Micro and Nano Flows Conference (MNF2009)-
dc.identifier.citation2nd Micro and Nano Flows Conference, Brunel University, West London, UK, 01-02 September 2009en_US
dc.descriptionThis paper was presented at the 2nd Micro and Nano Flows Conference (MNF2009), which was held at Brunel University, West London, UK. The conference was organised by Brunel University and supported by the Institution of Mechanical Engineers, IPEM, the Italian Union of Thermofluid dynamics, the Process Intensification Network, HEXAG - the Heat Exchange Action Group and the Institute of Mathematics and its Applications.en_US
dc.description.abstractA theoretical model, developed by the authors, for condensation in microchannels takes account of the effects of gravity, streamwise shear stress on the condensate surface as well as the transverse pressure gradient due to surface tension in the presence of change in condensate surface curvature. Numerical results have been generated for various channel shapes, dimensions and inclinations and for various fluids, vapourto-surface temperature differences and vapour mass fluxes. It is found that, over a certain length of channel, the local mean (around the channel perimeter) heat-transfer coefficient is essentially independent of gravity (including inclination of the channel) and surface shear stress and depends only on surface tension. For the surface tension dominated regime an equation for the Nusselt number, as a function of a single dimensionless group analogous to that occurring in the simple Nusselt theory except that the gravity is replaced by surface tension, has been derived both on the basis of dimensional analysis and by approximate theory. The equation represents all of the data satisfactorily.en_US
dc.publisherBrunel Universityen_US
dc.subjectSurface tensionen_US
dc.subjectHeat exchangeren_US
dc.titleCondensation in microchannels – Surface tension dominated regimeen_US
dc.typeConference Paperen_US
Appears in Collections:Brunel Institute for Bioengineering (BIB)
The Brunel Collection

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