On the temperature equation in a phase change pseudopotential lattice Boltzmann model. (December 2018)

• Record Type: Journal Article
• Authors: Li, Qing; Huang, J.Y.; Kang, Q.J.
• Is Part Of: International journal of heat and mass transfer. Volume 127(2018)Part B
• Page Start: 1112
• Page End: 1113
• Publication Date: 2018-12
• Subjects: Lattice Boltzmann method -- Pseudopotential model -- Phase change; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2018.07.139
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: The incorrectness of a modified phase change pseudopotential LB model is pointed out. The correct temperature equation for liquid–vapor phase change is clarified. The derivations are shown to be valid for both ideal and non-ideal gases. Abstract: In a recent paper by Gong et al. [19], the researchers claimed that in the previous models the derivation of the target temperature equation for liquid–vapor phase change is paradoxical because the equations of state for ideal gases and non-ideal gases are applied simultaneously, and therefore they proposed a modified pseudopotential lattice Boltzmann (LB) model for liquid–vapor phase change. In this technical note we clarify that the modified phase change pseudopotential LB model proposed by Gong et al. was based on a misunderstanding of the derivations in the previous studies as well as a mistake that they employed e = c v T, where e is the internal energy, to the derive the temperature equation for non-ideal gases.