Experimental and numerical study of single droplets impinging upon liquid films

• Autor(a) principal: Vasconcelos, Daniel
• Data de Publicação: 2019
• Outros Autores: Ribeiro, Daniela, Barata, Jorge M M, Silva, André
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.6/12146
• topic: Liquid films; Droplet impinging; Jet A-1; Biofuel; Volume of Fluid

The phenomenon of liquid drop impact onto liquid surfaces appears in a wide variety of engineering areas such as ink-jet printers, internal combustion engines, spray cooling, etc. The research of this study has been motivated by a need for better predictive capability in these industries. Many authors defined different outcomes regarding this phenomenon. Rioboo et al. [1] revealed more than six possible outcomes, which include deposition, stick, crown splash, prompt splash, among others. These different outcomes may vary depending on many factors such as the liquid drop parameters (diameter, impact velocity, viscosity, surface tension, etc.), the liquid film parameters (thickness, characteristics of the underlying surface, etc.) and the surrounding gas (velocity, pressure, etc.).