Publication de 8 numéros par an
ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074
Indexed in
Effect of Dissolved Noncondensables on Hydrodynamics of Microchannels Subject to Liquid Forced Convection
RÉSUMÉ
The impact of the desorption of dissolved noncondensables on the hydrodynamics of heated, long microchannels subject to liquid forced convection is theoretically studied. A one-dimensional model, based on the solution of mass, momentum, energy and a noncondensable species mass conservation equations, is developed. Parametric calculations representing typical microchannel geometric and flow conditions are then performed. It is shown that the desorption of noncondensables can lead to a gas-liquid two-phase flow and therefore enhance the fluid velocity in microchannels rather significantly, with the enhancement becoming larger as the channel length to diameter ratio is increased. Desorption of the noncondensable and its accompanying evaporation, furthermore, may lead to choking.
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Goldstein R.J., Eckert E.R.G., Ibele W.E., Patankar S.V., Simon T.W., Kuehn T.H., Strykowski P.J., Tamma K.K., Bar-Cohen A., Heberlein J.V.R., Davidson J.H., Bischof J., Kulacki F.A., Kortshagen U., Garrick S., Heat transfer – a review of 1999 literature, International Journal of Heat and Mass Transfer, 44, 19, 2001. Crossref
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Ghiaasiaan S.M., Abdel-Khalik S.I., Two-phase flow in microchannels, in Chemistry and Biology of Hyaluronan, 34, 2001. Crossref
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Adams T.M., Ghiaasiaan S.M., Abdel-Khalik S.I., Enhancement of liquid forced convection heat transfer in microchannels due to the release of dissolved noncondensables, International Journal of Heat and Mass Transfer, 42, 19, 1999. Crossref