On the ground effect in passive control using deflectors at the rear part of an Ahmed body

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dc.centroEscuela de Ingenierías Industriales
dc.contributor.authorSolis, P.
dc.contributor.authorDuran, E.
dc.contributor.authorGutiérrez-Castillo, Paloma
dc.contributor.authorDel-Pino-Peñas, Carlos Manuel
dc.date.accessioned2026-03-18T13:00:43Z
dc.date.created2026
dc.date.issued2026-02
dc.departamentoIngeniería Mecánica, Térmica y de Fluidos
dc.description.sponsorshipFunding for open access charge: Universidad de Málaga / CBUA
dc.identifier.citationP. Solis, E. Duran, P. Gutierrez-Castillo, C. del Pino, On the ground effect in passive control using deflectors at the rear part of an Ahmed body, European Journal of Mechanics - B/Fluids, Volume 119, 2026, 204495, ISSN 0997-7546, https://doi.org/10.1016/j.euromechflu.2026.204495. (https://www.sciencedirect.com/science/article/pii/S0997754626000427) Abstract: Drag measurements were performed over an Ahmed body with a 25-degree slant angle modified with rigid deflectors at the top rear edge. Experiments were conducted on both a wind tunnel and a towing water tank in the range of Reynolds numbers based on the height ReH=30×103−170×103. In the wind tunnel experiments, drag measurements were acquired at two ground clearances: a nominal height, and a larger distance 14 times the nominal one to minimize the ground effect. The inclusion of a deflector with an inclination in the range of α=[−8°,−4°] decreases the drag coefficient by up to 27% over the base case without deflector. Furthermore, an analytical correlation was developed to predict the drag coefficient as a function of Reynolds and deflector angle for each ground clearance. Additional 2D-PIV measurements obtained in the towing tank confirmed that the circulation of the C-vortex is significantly reduced compared to the base case. These results demonstrate that the observed drag reduction is primarily associated with a weakening of the induced wake structures. Keywords: Ahmed body; Passive control; Bluff body flow; Automotive aerodynamics
dc.identifier.doi10.1016/j.euromechflu.2026.204495
dc.identifier.urihttps://hdl.handle.net/10630/46095
dc.language.isoeng
dc.publisherElsevier
dc.rightsAttribution 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAerodinámica
dc.subject.otherAhmed body
dc.subject.otherPassive control
dc.subject.otherBluff body flow
dc.subject.otherAutomotive aerodynamics
dc.titleOn the ground effect in passive control using deflectors at the rear part of an Ahmed body
dc.typejournal article
dc.type.hasVersionVoR
dspace.entity.typePublication
relation.isAuthorOfPublication2d6b34c4-68cf-4887-8420-c1188f032849
relation.isAuthorOfPublication10bcf3f9-870a-4aa4-baac-eb2fa3d41152
relation.isAuthorOfPublication.latestForDiscovery2d6b34c4-68cf-4887-8420-c1188f032849

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