Generalized Labuntsov–Yagov Model for Single Sessile Vapor Bubble Growth in Microgravity

This study investigates the dynamics of single vapor bubble growth in near-saturated liquids under microgravity conditions, with particular emphasis on heat transfer mechanisms and evaporation phenomena. The research presents experimental validation of theoretical models for bubble growth kinetics across multiple pressure regimes (500–750 mbar) and thermal configurations, including systematic analysis of equivalent bubble diameter evolution, wall superheat dynamics, waiting time effects, and the influence of superheated layer characteristics on growth behavior. A generalized model has been developed based on the Labuntsov–Yagov correlation framework that incorporates time-dependent wall superheat conditions and accounts for evaporation contributions from both the contact line region and the bulk liquid-vapor interface. Comprehensive comparison between model predictions and experimental measurements demonstrates good agreement across the investigated parameter space, confirming the model’s validity and its capability to accurately capture the complex interplay between thermal boundary conditions and bubble growth dynamics under microgravity.