Temperature and pressure jump coefficients at a liquid-vapor interface

Autor(es)

Kalempa, Denize ; Graur, Irina

• Tipo de documento: Artigo Científico
• Fonte: Physics of Fluids; v. 36, n. 8, p. 9-pg., 2024-08-01.

Resumo

The temperature and pressure jump coefficients at a liquid-vapor interface are calculated from the solution of the Shakhov kinetic model for the linearized Boltzmann equation. Complete and partial evaporation/condensation at the vapor-liquid interface are assumed as the boundary condition. The discrete velocity method is used to solve the problem numerically. The jump coefficients are tabulated as functions of the evaporation/condensation coefficient. The profiles of the vapor temperature and pressure deviations from that values at the interface corresponding to the liquid temperature and saturation pressure are plotted, and the solutions obtained from kinetic theory and continuum approach are shown to underline the effect of the jumps at the interface. The obtained results have been compared to those given by other authors, who applied the linearized Boltzmann equation as well as the model proposed by Bhatnagar, Gross, and Krook to it, and it was found that the pressure and temperature jump coefficients are relatively insensitive to the collision laws. (AU)

• Processo FAPESP: 22/10476-1 - Modelagem de fluxo de gás fora do equilíbrio termodinâmico devido a transição de fase
• Beneficiário: Denize Kalempa
• Modalidade de apoio: Auxílio à Pesquisa - Regular