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Open AccessArticle

Pulsating Flow of an Ostwald—de Waele Fluid between Parallel Plates

1
Department of Civil Engineering, Faculty of Physics and Mathematical Sciences, University of Chile, Santiago 8370448, Chile
2
Department of Civil Engineering, Faculty of Physics and Mathematical Sciences, and Advanced Mining Technology Center, Faculty of Physics and Mathematical Sciences, University of Chile, Santiago 8370448, Chile
3
Dipartimento di Ingegneria Civile, Edile e Ambientale, Università degli Studi di Napoli Federico II, 80138 Naples, Italy
4
Dipartimento di Ingegneria, Università degli Studi della Campania Luigi Vanvitell, 81031 Aversa, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(4), 932; https://doi.org/10.3390/w12040932
Received: 4 February 2020 / Revised: 17 March 2020 / Accepted: 17 March 2020 / Published: 25 March 2020
The flow between two parallel plates driven by a pulsatile pressure gradient was studied analytically with a second-order velocity expansion. The resulting velocity distribution was compared with a numerical solution of the momentum equation to validate the analytical solution, with excellent agreement between the two approaches. From the velocity distribution, the analytical computation of the discharge, wall shear stress, discharge, and dispersion enhancements were also computed. The influence on the solution of the dimensionless governing parameters and of the value of the rheological index was discussed.
Keywords: pulsating flow; non-Newtonian fluid; velocity distribution; wall shear stress; discharge enhancement; dispersion enhancement pulsating flow; non-Newtonian fluid; velocity distribution; wall shear stress; discharge enhancement; dispersion enhancement
MDPI and ACS Style

González, R.; Tamburrino, A.; Vacca, A.; Iervolino, M. Pulsating Flow of an Ostwald—de Waele Fluid between Parallel Plates. Water 2020, 12, 932.

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