ISSN Online: 2377-424X
ISBN Print: 0-89116-130-9
International Heat Transfer Conference 6
POST-DRYOUT HEAT TRANSFER
Abstract
Post-dryout heat transfer mechanisms can
be subdivided according to the fluiddynamic
phenomena into three regions, namely
dispersed flow heat transfer, film-boiling
and transition boiling. A review of the
literature - mainly of the last four years -
shows that in the dispersed flow regime a
reliable prediction of the heat transfer
coefficient is possible due to a great number
of experimental results and several
physically based theoretical models.
Correlations for film boiling usually contain strongly simplified assumptions concerning the fluid dynamic behaviour in the vapor film and the interaction between the vapor and the liquid at the interphase. Systematic measurements are especially needed for film boiling in subcooled liquids. Furthermore the phenomena of transition boiling should be researched in more detail.
Correlations for film boiling usually contain strongly simplified assumptions concerning the fluid dynamic behaviour in the vapor film and the interaction between the vapor and the liquid at the interphase. Systematic measurements are especially needed for film boiling in subcooled liquids. Furthermore the phenomena of transition boiling should be researched in more detail.