Autor según el artículo: Diaz-Ojeda, H. P.; Huera-Huarte, F. J.; Gonzalez-Gutierrez, L. M.;

Departamento: Enginyeria Mecànica

Autor/es de la URV: Huera Huarte, Francisco Javier

Palabras clave: Wake Circular-cylinder

Resumen: In this work, the flow normal to a rectangular flat plate with sharp angles in the presence of the free surface and gravity has been studied numerically, using a three dimensional (3D) large Eddy simulation methodology. Most of the previous studies on this geometry consider either periodic assumptions or laminar regime Re similar to 0(10(3)). The numerical study described here, with a fully 3D simulation of the flat plate in turbulent regime Re similar to 0(10(5)), had not been reported earlier. Important differences have been found with respect to the laminar case or when periodic boundary conditions are assumed. The influence of the gravity force and the free surface interface on the hydrody namics of the problem is extremely relevant for industrial applications. The simulations are initially validated using a reference case with a plate with sharp corners and a single phase laminar 3D periodic configuration. The time averaged drag force, the velocity, and pressure fields are compared as well against the case of the plate with smooth corners. Finally, in the case of the two-phase 3D numerical simu lations, the drag force and the vorticity fields in the near wake of the plate are compared to recent experimental work [S. Satheesh and F. J. Huera-Huarte, Effect of the free surface on a flat plate translating normal to the flow, Ocean Eng. 171,458-468 (2019)]. These experiments were used as a guideline for the computational setup; consequently, the values of most of the dimensionless parameters are the same. A second scenario where the free surface is replaced by a solid wall is considered. Two important observations show up after this research: first, the characteristic unsteady frequencies that are found associated with two periodic regimes disappear when 3D cases are evaluated. In such a scenario, no dominant frequencies are found. Second, a critical submergence depth (distance) between the upper part of the plate and the free surface (or solid wall) has been found, where the drag force shows a maximum value. These observations are discussed in relation to the pressure distribution, the vortex structures formed at the wake, and the gap flow formed between the plate and the free surface. Published under license by AIP Publishing.

Áreas temáticas: Química Physics, fluids & plasmas Mechanics of materials Mechanics Mechanical engineering Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências Fluid flow and transfer processes Engineering (miscellaneous) Engenharias iv Engenharias iii Engenharias ii Engenharias i Condensed matter physics Computational mechanics Ciências biológicas i Ciência da computação Astronomia / física

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 10897666

Direcció de correo del autor: francisco.huera@urv.cat

Identificador del autor: 0000-0002-5447-3183

Fecha de alta del registro: 2023-02-22

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://aip.scitation.org/doi/pdf/10.1063/1.5111525

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Physics Of Fluids. 31 (10):

Referencia de l'ítem segons les normes APA: Diaz-Ojeda, H. P.; Huera-Huarte, F. J.; Gonzalez-Gutierrez, L. M.; (2019). Hydrodynamics of a rigid stationary flat plate in cross-flow near the free surface. Physics Of Fluids, 31(10), -. DOI: 10.1063/1.5111525

DOI del artículo: 10.1063/1.5111525

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2019

Tipo de publicación: Journal Publications