PIV and dynamic LES of the turbulent stream and mixing induced by a V-grooved blade axial agitator

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dc.contributor.authorGonzález-Neria, Israel
dc.contributor.authorAlonzo-Garcia, Alejandro
dc.contributor.authorMartínez-Delgadillo, Sergio A.
dc.contributor.authorMendoza-Escamilla, Víctor X.
dc.contributor.authorYáñez-Varela, Juan Antonio
dc.contributor.authorVerdin, Patrick G.
dc.contributor.authorRivadeneyra-Romero, Gabriela
dc.date.accessioned2019-07-01T11:22:05Z
dc.date.available2019-07-01T11:22:05Z
dc.date.issued2019-06-06
dc.description.abstractThe hydrodynamic behavior of a turbulent flow and the mixing characteristics generated by a V-grooved axial impeller inside an agitated tank reactor were investigated both experimentally and numerically. Angle resolved Particle Image Velocimetry (PIV) techniques with an angular displacement Δθ = 5° have been applied and two aerodynamic planes along the blades were considered. PIV-based results were compared to those obtained by Large Eddy Simulation (LES), used with the dynamic Smagorinsky-Lilly sub-grid scale (SGS) model. Results showed the existence of distinctive recirculation zones in the aerodynamic planes, and new additional frequencies in the impeller stream, induced by the grooves. A decrease of mixing time of about 11% was obtained experimentally, consequence of the better suction induced by the grooved blades in the early stages of mixing. Mean velocities, vorticity, TKE obtained from LES showed a good agreement with the PIV-based results. The distributions of turbulence dissipation rate ε were similar to those obtained from PIV, however showing high under-predicted magnitudes.en_UK
dc.identifier.citationGonzález-Neria I, Alonzo-Garcia A, Martínez-Delgadillo SA, et al., (2019) PIV and dynamic LES of the turbulent stream and mixing induced by a V-grooved blade axial agitator. Chemical Engineering Journal, Volume 374, October 2019, pp. 1138-1152en_UK
dc.identifier.cris23707949
dc.identifier.issn1385-8947
dc.identifier.urihttps://doi.org/10.1016/j.cej.2019.06.033
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14279
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectV-groovesen_UK
dc.subjectPIVen_UK
dc.subjectLESen_UK
dc.subjectTurbulent flowen_UK
dc.subjectDissipation rateen_UK
dc.subjectAxial impelleren_UK
dc.titlePIV and dynamic LES of the turbulent stream and mixing induced by a V-grooved blade axial agitatoren_UK
dc.typeArticleen_UK

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