In this study, we propose and validate a new phase change source term based on the Gong and Cheng's lattice Boltzmann (LB) model (Gong and Cheng, 2012) [1]. A modified phase transition LB model, combined with a multicomponent LB method, was applied to simulate co-existing boiling and condensation phenomena interesting a multicomponent fluid (i.e., water and non-condensable gas (NCG)) in a confined space. Additionally, we investigated and discussed numerically the effects of the NCG concentration on the heat and mass transfer performances during the phase change of multiphase and multicomponent fluids in a confined space. In particular, these effects were studied considering variable solid wettability and confined scale conditions.

在这项研究中，我们基于龚和程的格子玻尔兹曼（LB）模型（龚和程，2012）[1]提出并验证了一个新的相变源项。改进的相变 LB 模型与多组分 LB 方法相结合，用于模拟密闭空间中多组分流体（即水和不凝气体 (NCG)）的共存沸腾和冷凝现象。此外，我们研究和数值讨论了 NCG 浓度对密闭空间中多相和多组分流体相变过程中传热和传质性能的影响。特别是，考虑到可变的固体润湿性和受限尺度条件，研究了这些影响。