Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/53189
Título: | Electro-osmotic and pressure-driven flow of viscoelastic fluids in microchannels: analytical and semi-analytical solutions |
Autor(es): | Ferrás, Luís Jorge Lima Afonso, A. M. Alves, M. A. Nóbrega, J. M. Pinho, F. T. |
Data: | 2016 |
Editora: | American Institute of Physics |
Revista: | Physics of Fluids |
Resumo(s): | In this work, we present a series of solutions for combined electro-osmotic and pressure-driven flows of viscoelastic fluids in microchannels. The solutions are semi-analytical, a feature made possible by the use of the Debye-Huckel approximation for the electrokinetic fields, thus restricted to cases with small electric double-layers, in which the distance between the microfluidic device walls is at least one order of magnitude larger than the electric double-layer thickness. To describe the complex fluid rheology, several viscoelastic differential constitutive models were used, namely, the simplified Phan-Thien-Tanner model with linear, quadratic or exponential kernel for the stress coefficient function, the Johnson-Segalman model, and the Giesekus model. The results obtained illustrate the effects of the Weissenberg number, the Johnson-Segalman slip parameter, the Giesekus mobility parameter, and the relative strengths of the electro-osmotic and pressure gradient-driven forcings on the dynamics of these viscoelastic flows. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/53189 |
DOI: | 10.1063/1.4962357 |
ISSN: | 1070-6631 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito autor |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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PaperPublished.pdf Acesso restrito! | 786,95 kB | Adobe PDF | Ver/Abrir |