TY - JOUR
TI - Numerical prediction of nucleate pool boiling heat transfer coefficient under high heat fluxes
AU - Pezo Milada L
AU - Stevanović Vladimir D
JN - Thermal Science
PY - 2016
VL - 20
IS - 11
SP - 113
EP - 123
PT - Article
AB - This paper presents CFD (Computational Fluid Dynamics) approach to prediction  of the heat transfer coefficient for nucleate pool boiling under high heat  fluxes. Three-dimensional numerical simulations of the atmospheric saturated  pool boiling are performed. Mathematical modelling of pool boiling requires  a treatment of vapor-liquid two-phase mixture on the macro level, as well as  on the micro level, such as bubble growth and departure from the heating  surface. Two-phase flow is modelled by the two-fluid model, which consists  of the mass, momentum and energy conservation equations for each phase.  Interface transfer processes are calculated by the closure laws. Micro level  phenomena on the heating surface are modelled with the bubble nucleation  site density, the bubble resistance time on the heating wall and with the  certain level of randomness in the location of bubble nucleation sites. The  developed model was used to determine the heat transfer coefficient and  results of numerical simulations are compared with available experimental  results and several empirical correlations. A considerable scattering of the  predictions of the pool boiling heat transfer coefficient by experimental  correlations is observed, while the numerically predicted values are within  the range of results calculated by well-known Kutateladze, Mostinski,  Kruzhilin and Rohsenow correlations. The presented numerical modeling  approach is original regarding both the application of the two-fluid  two-phase model for the determination of heat transfer coefficient in pool  boiling and the defined boundary conditions at the heated wall surface.  [Projekat Ministarstva nauke Republike Srbije, br. 174014]