ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
A PHYSICAL MODEL FOR TWO PHASE FLOWS WITH THERMODYNAMIC AND HYDRODYNAMIC NON-EQUILIBRIUM
Sinopsis
A calculation scheme is described for the prediction of diabatic annular two phase flows where significant departures from thermodynamic equilibrium occur.
The scheme is an extension of earlier models in which departures from hydrodynamic equilibrium were considered
allowing predictions of dryout and associated phenomena. In the new scheme both hydrodynamic and thermodynamic
disequilibrium are calculated. The application of the model to prediction of the condensation of a superheated vapour and of heat transfer in the post-dryout
region is discussed. In both cases a liquid phase (assumed to be at the saturation temperature at its interface) is in contact with a superheated vapour.
Reasonable agreement is obtained for the
prediction of data obtained at Harwell and elsewhere.