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Información tecnológica

versão On-line ISSN 0718-0764

Resumo

BARRERA, Eddie F.; AGUIRRE, Fredy A.; VARGAS, Salvador  e  MARTINEZ, Edwin D.. Influence of Y Plus on the value of the Wall Shear Stress and the Total Drag Coefficient through Computational Fluid Dynamics Simulations. Inf. tecnol. [online]. 2018, vol.29, n.4, pp.291-302. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642018000400291.

In this work we studied the influence of Y plus (y+) on friction forces by computational fluid analysis to evaluate wall shear stress (() and the total drag coefficient (Cd) using a commercial Computational Fluid Dynamics (CFD) software, ANSYS-FLUENT V16.1. The analysis was made on the hull wall of a submarine autonomous vehicle; the Reynolds number used was 1.36 x106, based on the diameter of the submarine hull. The results showed that even though the y+ variation is within the viscous sublayer (y+ < 2) there is a dependence of the shear wall stress and drag coefficient results according to this parameter. For coarse meshing (y+ = 1.55) and extra-fine meshing (y+ = 0.00375); the percentage of variation of the wall shear stress was 74% and for the total drag coefficient was 44.3%; while the variation of the simulation time was 71%.

Palavras-chave : computational fluid dynamics; wall shear stress; meshed density; y+; simulation time.

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