DOI: 10.1615/ICHMT.2004.IntThermSciSemin
ISBN Print: 978-9-61913-930-1
A contribution to multidimensional two-fluid modeling of subcooled boiling flow
摘要
The need to investigate low-pressure subcooled boiling has recently appeared in reactor safety analyses. The topic of the present work is a multi-dimensional modeling of subcooled boiling flow using a two-fluid approach and calculation of local two-phase flow parameters (void fraction and bubble size). Phase-change and hydrodynamic mechanisms are modeled. The dependence of bubble diameter on local flow conditions was taken into account. A sensitivity analysis of closure equations highlighted the importance of lateral hydrodynamic mechanisms and variation of local bubble diameter in the modeling of subcooled flow boiling at low-pressure conditions. The evolutions of two-phase flow parameters in the radial and axial directions are calculated for experimental conditions from the literature [1] and compared to experimental results.