Kinetic simulation of the non-equilibrium effects at the liquid-vapor interface

A.Ph. Ph Polikarpov (1) , Irina Martin Graur (2, 3) , E.Ya. Gatapova (4) , O.A. A Kabov (4)

1 UrFU - Ural Federal University [Ekaterinburg]
2 IUSTI - Institut universitaire des systèmes thermiques industriels
3 AMU - Aix Marseille Université
4 Kutateladze Institute of Thermophysics

7 Phase change phenomena at microscale is important for novel cooling microsys-tems with intensive evaporation, so the development of reliable models and simulations are challenging. The vapor behaviors near its condensed phase are simulated using the non-linear S-model kinetic equation. The pressure and temperature jumps obtained numerically are in good agreement with the analytical expressions derived from the appropriate Onsager-Casimir reciprocity relations. The results of the evaporation flux are close to those given by the Hertz-Knudsen-Schrage formula, only when the values of the pressure and temperature at the upper boundary of the Knudsen layer are used. Comparison with recently measured temperature jumps are provided and disagreement with some experiments are discussed.

Mots clés: liquid-vapor interface; evaporation rate; Knudsen layer; molecular

Domaines: Sciences de l'ingénieur [physics]

A.Ph. Ph Polikarpov, Irina Martin Graur, E.Ya. Gatapova, O.A. A Kabov. Kinetic simulation of the non-equilibrium effects at the liquid-vapor interface. International Journal of Heat and Mass Transfer, 2019, 136, pp.449-456. ⟨10.1016/j.ijheatmasstransfer.2019.02.100⟩. ⟨hal-02904983⟩