Numerical simulation of high heat flux pool boiling using PLIC-VOF method

Nagasaki, Takao*; Aoki, Takayuki*; Sugihara, Kenta; Nishimura, Masato*; Nakashima, Akira*; Nakamura, Kazuhiro*; Marui, Kentaro*

no journal, , 

Boiling is a gas-liquid two-phase phenomenon of practical importance used in nuclear power generation and equipment cooling. Still, its numerical simulation has not yet been fully developed due to its complex nature involving phase changes. In this study, numerical simulations of pool nucleate boiling, the most basic form of boiling, are performed for a realistic case with many foaming points. The PLIC-VOF method, a sharp interface method, is used because high lattice resolution is required to reproduce the fine boiling structure near the superheated wall, especially for high heat flux boiling. For the solution of the pressure field, a weakly compressible fluid model was used in this study because the Poisson equation solver for the pressure in incompressible flows must be faster and larger in scale. In addition, micro-liquid film evaporation at the bottom of vapor bubbles growing on the wall surface is modeled and incorporated into the calculations. Nucleate boiling was simulated using the above calculation method, and the bubble behavior and wall heat flux were compared with existing experimental results to examine the validity of this simulation.