Flow Field Characteristics of Bubble Growth of Subcooled Flow Boiling in Vertical Narrow Rectangular Channel

A growth model of bubbles in sub-cooling flow boiling was established by VOF two-phase flow model,and the bubble growth process was numerically simulated by UDF interface procedures. The factors such as the velocity of mainstream speed,sub-cooling degree of the mainstream,the degree of the heating wall and vapor-liquid contact angle were considered in the simulation. The growth curve of bubbles in subcooling flow boiling was also obtained. The velocity field of bubble growth process was investigated atdifferent working conditions. The relationship between the bubble inner velocity field and the velocity speed of the interface was also studied.