Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/74595
Título: | Hydrodynamic entrance length for laminar flow in microchannels with rectangular cross section |
Autor(es): | Ferreira, Germán Sucena, Artur Ferrás, Luís Jorge Lima Pinho, Fernando T. Afonso, Alexandre M. |
Palavras-chave: | Development length 3D microchannels Newtonian fluid Effects of Reynolds number and aspect ratio Numerical methods Finite volume method |
Data: | Jul-2021 |
Editora: | MDPI |
Revista: | Fluids |
Resumo(s): | This work presents a detailed numerical investigation on the required development length (L=L/B) in laminar Newtonian fluid flow in microchannels with rectangular cross section and different aspect ratios (AR). The advent of new microfluidic technologies shifted the practical Reynolds numbers (Re) to the range of unitary (and even lower) orders of magnitude, i.e., creeping flow conditions. Therefore, accurate estimations of L at Re≤O(1) are important for microsystem design. At such low Reynolds numbers, in which inertial forces are less dominant than viscous forces, flow characteristics become necessarily different from those at the macroscale where Re is typically much larger. A judicious choice of mesh refinement and adequate numerical methods allowed obtaining accurate results and a general correlation for estimating L, valid in the ranges 0≤Re≤2000 and 0.1≤AR≤1, thus covering applications in both macro and microfluidics. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/74595 |
DOI: | 10.3390/fluids6070240 |
ISSN: | 2311-5521 |
e-ISSN: | 2311-5521 |
Versão da editora: | https://www.mdpi.com/2311-5521/6/7/240/htm |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CMAT - Artigos em revistas com arbitragem / Papers in peer review journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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fluids-06-00240.pdf | 393,39 kB | Adobe PDF | Ver/Abrir |