Modelling the fluid-flow inside a microchannel under impact loads

• Tipo: Artigo em Revista Científica Internacional
• Data: 2020

Autores

Parras, L (Autor) Outra; Galindo Rosales, FJ (Autor) FEUP

Revista

Título: Journal of Fluids and Structures

Vol. 97

ISSN: 0889-9746

Editora: Elsevier

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00S-D9K

DOI: 10.1016/j.jfluidstructs.2020.103069

Abstract (EN): This work presents a simple model of the flow generated in microchannels when the upper lid has a vertical deformation that depends on time and space. This model is able to capture the dynamics of the flow generated for two fundamental cases: full displacement of the upper lid and the flow generated by an impactor. The results for these cases have been compared with full 3D simulations with a moving mesh and experiments providing very accurate results. Once the model is validated, it is used for the analysis of the effect of the different parameters that control the flow, and for providing general laws for the non-dimensional energy consumed up to a time t(0) in which the microchannel reaches half of its initial height. Finally, it is demonstrated that the general laws obtained for the non-dimensional energy are fully independent of the closing laws used.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14