A NEW MODEL FOR NUCLEATE BOILING HEAT-TRANSFER

A new model to calculate heat transfer coefficients in nucleate boilin g is presented. Heat transfer and fluid flow around a single bubble ar e investigated taking into account the influence of meniscus curvature , adhesion forces and interfacial thermal resistance on the thermodyna mic equilibrium at the gas-liquid interface. The model requires only b ubble site densities and departure diameters. Further quantities excep t the thermophysical properties are not needed. From the results bubbl e growth rates can be derived. As an example nucleate boiling heat tra nsfer coefficients of R-114 were calculated. They agree with experimen tal values within the experimental accuracy.