Listar por autor "Hernández, Santiago"
Mostrando ítems 1-18 de 18
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3D LES simulations of a static and vertically free-to-oscillate 4:1 rectangular cylinder: effects of the grid resolution
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Nguyen, D.T.; Owen, J.S.; Hernández, Santiago (Elsevier, 2019)[Abstract:] In the present study, the aerodynamics of the flow fields around a static and vertically free-to-oscillate 4:1 rectangular cylinder are analysed by means of 3D LES simulations, adopting the OneEqEddy viscosity ... -
A Computational Study on the Aerodynamics of a Twin-Box Bridge With a Focus on the Spanwise Features
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Kwok, Kenny; Hernández, Santiago (Elsevier, 2021)[Abstract] The wind flow around twin-box decks is particularly complex due to the very important role played by the slot distance between girders and the presence of the downwind box that is immersed in the wake of the ... -
A simplified CFD approach for bluff-body aerodynamics under small scale free stream turbulent flow
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Kwok, Kenny; Hernández, Santiago (Elsevier, 2023)[Abstract:] The study of free stream turbulence (FST) effects on bluff bodies by means of computational approaches has been addressed so far mainly applying scale resolving methods adopting a three-dimensional domain, which ... -
Aerodynamic performance of twin-box decks: a parametric study on gap width effects based on validated 2D URANS simulations
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Kwok, Kenny; Hernández, Santiago (Elsevier, 2018)[Abstract:] 2D URANS simulations are conducted aiming to study the aerodynamic performance under smooth flow of twin-box decks depending on the gap distance between girders. The Stonecutters Bridge is taken as the reference ... -
Aerostructural Optimization of Long Span Bridges: Current Advances and Challenges
Hernández, Santiago; Nieto Mouronte, Félix; Cid Montoya, Miguel; Jurado, José Ángel (ASCE, 2020)[Abstract] This paper describes the evolution of deck shape of long span bridges since the Tacoma Narrows collapse trying to avoid undesirable aerodynamic behavior under wind flow and the trend in the last decades to ... -
An Open-Source Framework for Aircraft Damage Simulation in Engine Failure Events
Cid, Clara; Baldomir, Aitor; Rodríguez-Segade, Miguel; Hernández, Santiago (Elsevier, 2022)[Abstract] The aerospace industry demands designs capable of withstanding the simultaneous collapse of several structural elements. Examples of this failure scenario are propeller blade or uncontained engine rotor failures, ... -
Bridge deck flutter derivatives: Efficient numerical evaluation exploiting their interdependence
Nieto Mouronte, Félix; Owen, John S.; Hargreaves, David M.; Hernández, Santiago (Elsevier, 2015-01)Increasing the efficiency in the process to numerically compute the flutter derivatives of bridge deck sections is desirable to advance the application of CFD based aerodynamic design in industrial projects. In this article, ... -
Computational Techniques for Novel Design of Long-Span Bridges Considering Aeroelastic Phenomena
Cid Montoya, Miguel; Nieto Mouronte, Félix; Hernández, Santiago; Kareem, Ahsan; Ding, Fei (ASCE, 2020)[Abstract] Optimization techniques have demonstrated their capability to obtain economic and sustainable designs while meeting the performance and safety requirements in a number of engineering disciplines. In the bridge ... -
Efficient Modal-Based Method for Analyzing Nonlinear Aerostatic Stability of Long-Span Bridges
Cid Montoya, Miguel; Hernández, Santiago; Kareem, Ahsan; Nieto Mouronte, Félix (Elsevier, 2021)[Abstract] An efficient method for analyzing the nonlinear aerostatic stability of long-span bridges using a modal formulation is proposed. First, a simplified linear version defined as modal-based approach is introduced, ... -
Experimental and Computational Studies on the Performance of Solar Trackers Under Vortex Shedding, Torsional Divergence, and Flutter
Quintela Suárez, Juan; Jurado, José Ángel; Rapela Ponte, Carlos; Álvarez Naveira, Antonio José; Roca Rodríguez, Miguel; Hernández, Santiago; Cid Montoya, Miguel; López Rodríguez, Juan María; Ruiz Moreno, Antonio Jesús; Moreno Echarri, Itxaso; Jiménez Romero, Sergio (WIT Press, 2020)[Abstract] The current development of renewable energies has originated a number of new structural typologies that are the physical support of the energy production systems. Photovoltaic energy is a very mature source and ... -
Fail-safe optimum cable system under cable breakage in cable-stayed bridges. Application to the Queensferry Crossing Bridge
Soto Méndez, Noel; Cid, Clara; Baldomir, Aitor; Hernández, Santiago (Elsevier, 2023)[Abstract:] This paper presents a methodology to optimize the cable system in cable-stayed bridges, whose main novelty is to take into account the accidental breakage of one cable within the design process. To this end, a ... -
Inclusion of Mechanical Dampers in the Multimodal Flutter Analysis of Slender Structures
Quintela Suárez, Juan; Jurado, José Ángel; Rapela Ponte, Carlos; Álvarez Naveira, Antonio José; Hernández, Santiago (WIT Press, 2020)[Abstract] Sometimes slender structures are reinforced with mechanical dampers to reduce the vibrations caused by aeroelastic phenomena like flutter. However the formulation of flutter analysis only considers the classical ... -
Multi-bubble scheme and structural analysis of a hypersonic stratospheric flight vehicle
Rodríguez-Segade, Miguel; Hernández, Santiago; Díaz, J. (Elsevier, 2022)[Abstract:] The STRATOFLY MR3 vehicle is the main objective of the STRATOFLY project, which aims to develop a hypersonic air breathing concept capable of covering antipodal routes in less than three hours. The aircraft ... -
Numerical simulations of the aerodynamic response of 2D circular segments by means of URANS
Nieto Mouronte, Félix; Cid Montoya, Miguel; Álvarez Naveira, Antonio José; Hernández, Santiago; Jurado, José Ángel (WIT Press, 2016)[Abstract:] In the wind engineering field, the so-called D-section (semi-circular cylinder) has attracted some attention from researchers, since it is a galloping prone geometry. In fact, a modest number of references where ... -
Square Cylinder Under Different Turbulent Intensity Conditions by Means of Small-Scale Turbulence
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Kwok, Kenny; Hernández, Santiago (WIT Press, 2021)[Abstract] The phenomenon of turbulence is present in almost every type of flow in practical applications. Depending on its level of intensity and length scale, it can modify both the aerodynamic and aeroelastic performance ... -
Study of a static and vertically free-to-oscillate 4:1 rectangular cylinder by means of 2D URANS simulations
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Hernández, Santiago (WIT Press, 2018)[Abstract:] Flexible structures, such as cable-supported bridges, are prone to suffer from vortex-induced vibrations (VIV) under wind flow, as their span lengths are steadily growing in the last decades. VIV is a phenomenon ... -
Verification Approaches for the 3D Static LES Simulations of the Stonecutters Bridge Deck
Álvarez Naveira, Antonio José; Nieto Mouronte, Félix; Hernández, Santiago (WIT Press, 2021)[Abstract] In computational fluid dynamics (CFD) simulations, verification is the process of identifying both the spatial and the temporal discretisations providing relatively insensitive model results. The underlying goal ... -
Wave Celerity in Hydraulic Transients Computation for CIPP-Rehabilitated Pipes
Evangelista, F.; Hernández, Santiago; Mambretti, Stefano; Parola, D. (WIT Press, 2020)[Abstract] Most of the water pipe infrastructure is outdated; therefore, frequent maintenance and repair works are required. To speed up the rehabilitation work and to have a more sustainable and efficient approach, ...