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Topic

Nonlinear Heat and Mass Transfer Resistivities for Liquid-Vapor Interfaces

Department of Mechanical Engineering

Date & location

• Tuesday, April 22, 2025

• 10:00 A.M.

• Virtual Defence

Reviewers

Supervisory Committee

• Dr. Henning Struchtrup, Department of Mechanical Engineering, University of Victoria (Supervisor)

• Dr. Andrew Rowe, Department of Mechanical Engineering, UVic (Member) 

External Examiner

• Dr. James McDonald, Department of Mechanical Engineering, University of Ottawa 

Chair of Oral Examination

• Dr. Amanda Bates, Department of Biology, UVic

   

Abstract

Nonlinear heat and mass transfer at liquid-vapor interfaces is studied, focusing on how interface resistivities vary with the intensity of non-equilibrium. Two distinct ex perimental approaches are considered: conventional experiments with relatively small mass and heat fluxes [G. Fang and C. A. Ward, Phys. Rev. E 59, 419 (1999)], and Molecular Dynamics (MD) experiments with relatively large fluxes [Homes, Simon and Vrabec, Jadran, Physics of Fluids 36, 2 (2024)]. This contrast leads us to the question: whether the strength of non-equilibrium impacts interface resistivities [Henning Struchtrup and Hans Christian Öttinger. Phys. Rev. E, 108(6):064801, 2023]. Based on a kinetic interface model, nonlinear resistivities are assessed in relation to interface temperature and the fluxes of mass and heat. The results show that for smaller fluxes, resistivities depend solely on local temperature, as is typically assumed in Linear Irreversible Thermodynamics. However, for larger fluxes, resistivities are influenced by the fluxes themselves as well.