Abstract The purpose of this discussion is to pay the attention among International Journal of Multiphase Flow readers. Comments are presented on the study by Li and Hibiki (2017) where the researchers presented correlation of frictional pressure drop for two-phase flows in micro and mini single-channels. In this discussion, the two-phase frictional pressure drop equation in homogenous flow model is corrected. In addition, a look on the two-phase mixture density (ρtp) equation is presented. From the current analysis, the newcomers to the field of two-phase flow should avoid this wrong definition of the two-phase density (ρtp).

中文翻译：

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评《微型和微型单通道两相流摩擦压降相关性》

摘要 本次讨论的目的是引起国际多相流杂志读者的关注。对 Li 和 Hibiki (2017) 的研究发表了评论，研究人员在该研究中提出了微型和微型单通道中两相流的摩擦压降的相关性。在本次讨论中，修正了均质流模型中的两相摩擦压降方程。此外，还介绍了两相混合物密度 (ρtp) 方程。从目前的分析来看，两相流领域的新手应该避免这种错误的两相密度（ρtp）定义。