Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Breakup of thin liquid sheet with a viscous interface
Submission Author:
Vitor Heitor Cardoso Cunha , RJ
Co-Authors:
Vitor Heitor Cardoso Cunha, Sergio Ribeiro, Marcio CARVALHO
Presenter: Vitor Heitor Cardoso Cunha
doi://10.26678/ABCM.COBEM2021.COB2021-0196
Abstract
Thin liquid films play a big role in many real-life applications and are of indisputable interest to scientific and industrial researchers. Understanding the physical mechanisms contributing to the stability of thin liquid films is a challenging problem, as thin films’ flows present a fluid-fluid interface which is free to deform. The interface is bounded between two liquids or a liquid and a gas, typically having its own dynamic properties from which surface tension effects and complex interfacial rheological behavior arises. Instability effects are driven by long-range intermolecular forces, also known as van der Waals attractions, and might result in the rupture of the layer. In this work, a computational investigation of the breakup dynamics of a stationary thin liquid sheet bounded by a passive gas with a viscous interface is presented. The Arbitrary Lagrangian-Eulerian method (ALE) is used to track the interface position. The rheological behavior of the viscous interface is modeled by the Boussinesq-Scriven constitutive law, and the numerical solution is obtained through the Finite Element Method. The results show that thin liquid film stability is influenced both by surface rheology and disjoining effects and that the viscous character of the interface delays the sheet breakup, leading to more stable films.
Keywords
Thin liquid sheets, Viscous Interfaces, Boussinesq-Scriven, Interfacial rheology, surface flow
