Modeling of a single bubble dynamics at boiling by lattice Boltzmann method

To study the process of boiling on a solid heater surface, a hybrid model based on lattice Boltzmann method (LBM) and heat transfer equation is presented. The process of formation and rise of a single bubble during boiling over a single lyophobic zone located on a smooth lyophilic surface was studied. Dependences of the bubble detachment frequency and bubble detachment diameter on the width of the lyophobic zone and the wall superheat were obtained. It is shown that the bubble detachment diameter increases with the width of the lyophobic zone, and the frequency of bubble detachment increases with the wall superheat. Based on the obtained data, the optimal size of the lyophobic zone on the lyophilic surface was determined from the point of view of heat transfer enhancement.