IMTF - Artículos
Envíos recientes
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A strongly-coupled model for flexible rotors
(Elsevier, 2019)A fluid–structure model describing the equilibrium state of a flexible blade rotor with its own wake is derived for various external axial flow conditions. The model is based on three building blocks. The two-dimensional ... -
Joukowski’s wake model for tip-splitting rotors.
(IOP Publishing, 2021)The interaction between a tip vortex and a solid surface is responsible for premature structural component fatigue in wind turbines and undesirable noise in helicopter rotors during low speed and descending flight. One ... -
Demonstration of patient-specific simulations to assess Left Atrial Appendage Thrombogenesis Risk.
(Frontiers, 2021)Atrial fibrillation (AF) alters left atrial (LA) hemodynamics, which can lead to thrombosis in the left atrial appendage (LAA), systemic embolism and stroke. A personalized risk- stratification of AF patients for stroke ... -
Closely spaced co-rotating helical vortices: General solutions
(American Physics Society, 2021)In this work, we present general solutions for closely spaced co-rotating helical vortices using a filament approach. For these vortex structures, helical symmetry is broken, but solutions maintain a form of spatial ... -
Structure and stability of Joukowski’s rotor wake model.
(Cambridge University Press, 2021-01-25)In this work, Joukowski’s rotor wake model is considered for a two-blade rotor of radius Rb rotating at the angular velocity ΩR in a normal incident velocity V∞. This model is based on a description of the wake by a limited ... -
Generalized helical vortex pairs
(Cambridge University Press, 2019)New solutions describing the interaction of helical pairs of counter-rotating vortices are obtained using a vortex filament approach. The vortices are assumed to have a small core size allowing the calculation of the ... -
Comparison of Initial Mechanical Properties of 4 Hamstring Graft Femoral Fixation Systems Using Nonpermanent Hardware for Anterior Cruciate Ligament Reconstruction: An In Vitro Animal Study
(Elsevier, 2006)Purpose: To compare the initial mechanical characteristics of 4 systems used to fix tendons to the femur during anterior cruciate ligament reconstruction. Methods: A total of 32 porcine femurs were used to study the ... -
On the autorotation of animal wings.
(The Royal Society, 2017)Botanical samaras spin about their centre of mass and create vertical aerody- namic forces which slow their rate of descent. Descending autorotation of animal wings, however, has never been documented. We report here that ... -
Propagation of Uncertainty in a Rotating Pipe Mechanism to Generate an Impinging Swirling Jet Flow for Heat Transfer from a Flat Plate
(Springer Nature, 2020-06-28)In Computational Fluid Dynamics (CFD) studies composed of the coupling of different simulations, the uncertainty in one stage may be propagated to the following stage and affect the accuracy of the prediction. In this ... -
Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet
(Elsevier, 2021-10-12)It is acknowledged by mechanical and aeronautical engineers that many important industrial fluid mechanics simulation-based decisions are made by analysing Reynolds-Averaged Navier-Stokes (RANS) simulations. However, despite ... -
Passive Mechanical Heat/Mass Exchange Enhancement by Semi-Confined Laminar Parallel Wall Jets
(Elsevier, 2021-06-24)Many different approaches have been investigated in the literature to achieve efficient heat and mass exchangers in applications in several fields such as mechanical, aeronautical or biomedical engineering. Some of these ... -
Machine Learning-Aided Design Optimisation of a Mechanical Micromixer
(AIP Publishing, 2021-06-09)In real-life mechanical engineering applications, it is often complex to achieve an optimal multi-objective design, because of the costs related to fabrication and test of different prototypes. For this reason, the use of ... -
Vortex flow structures and interactions for the optimum thrust efficiency of a heaving airfoil at different mean angles of attack
(AIP Publishing, 2015)The thrust efficiency of a two-dimensional heaving airfoil is studied computationally for a low Reynolds number using a vortex force decomposition. The auxiliary potentials that separate the total vortex force into lift ... -
On the development of lift and drag in a rotating and translating cylinder
(Elsevier, 2015)The two-dimensional flow around a rotating cylinder is investigated nu- merically using a vorticity forces formulation with the aim of analyzing quan- titatively the flow structures, and their evolutions, that contribute ... -
Assessment of two vortex formulations for computing forces of a flapping foil at high Reynolds numbers
(American Physical Society, 2019)Several vortex formulations for computing the lift and drag/thrust forces on a flapping foil are compared in terms of simplicity, accuracy and suitability for using with experimental data of mea- sured velocity and vorticity ... -
Dimensional synthesis of mechanisms using Differential Evolution with auto-adaptive control parameters.
(Elsevier, 2013-06)This paper presents how an algorithm based on Differential Evolution (DE) with no constant control parameters solves the dimensional synthesis of four and six-bar mechanisms for path generation. The selection of values ... -
Multiobjective constrained optimal synthesis of planar mechanisms using a new evolutionary algorithm
(Elsevier, 2007-07)The paper deals with solution methods to multiobjective optimization problems. A searching procedure is developed, which applies genetic algorithms based on evolutionary techniques. The new method has proved to solve ... -
Turning Functions in Optimal Synthesis of Mechanisms
(The American Society of Mechanical Engineers, 2015-06)In this paper turning functions utilization for comparing errors between the coupler point and target trajectory is described. The reason why these functions are used is that the error obtained with them does not depend ... -
An evolutionary algorithm for path synthesis of mechanisms.
(Elsevier, 2011-02)An algorithm for synthesis of mechanisms is described in this work. The algorithm is called MUMSA (Malaga University Mechanism Synthesis Algorithm). This algorithm is an improvement of the one that was published in 2002. ... -
Bio-inspired spiking neural network for nonlinear systems control.
(Elsevier, 2018)Spiking neural networks (SNN) are the third generation of artificial neural networks. SNN are the closest approximation to biological neural networks. SNNs make use of temporal spike trains to command inputs and outputs, ...