Mass and heat transfer resistivities at liquid–vapor interfaces: Beyond the ideal gas

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struchtrup_henning_iJHeatMassTransfer_2025.pdf (1.62 MB)

Date

2025

Authors

Struchtrup, Henning

Journal Title

Journal ISSN

Volume Title

Publisher

International Journal of Heat and Mass Transfer

Abstract

The classical Hertz–Knudsen–Schrage (HKS) model for non-equilibrium mass and heat transfer across liquid–vapor interfaces is extended to account for real gas effects and non-linearity. Specifically, the HKS relations are re-derived for a temperature and velocity dependent condensation coefficient (Tsuruta et al., 1999) and combined with real gas property relations derived from the Enskog–Vlasov (EV) equation (Struchtrup and Frezzotti, 2022). The resulting non-linear Tsuruta–EV–HKS model is valid for mass and heat transfer up to the critical point. The resulting interfacial resistivities exhibit marked dependence on temperature, with resistivities strongly decreasing towards the critical point, as well as non-linear dependence on mass and heat flux.

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Keywords

liquid-vapor interface, nonequilibrium, evaporation, condensation, heat transfer, interface resistivities

Citation

Struchtrup, H. Mass and heat transfer resistivities at liquid-vapor interfaces: Beyond the ideal gas. International Journal of Heat and Mass Transfer, 256, 127943. https://doi.org/10.1016/j.ijheatmasstransfer.2025.127943

URI

https://doi.org/10.1016/j.ijheatmasstransfer.2025.127943
 https://hdl.handle.net/1828/22857

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