Listar por autor "Sanmiguel-Rojas, Enrique"
Mostrando ítems 1-10 de 10
-
Aquatic self-propulsion and energy harvesting from the currents through flexible flapping foils.
(UMA Editorial, 2024)En esta tesis doctoral se analiza principalmente el potencial de los vehículos acuáticos bioinspirados que se propulsan mediante perfiles batientes. En especial, se emplea un enfoque teórico basado en la teoría del movimiento ... -
Contribution to the study of nonstationary aerodynamic forces in problems of interest for Micro-Air Vehicles
(UMA Editorial, 2016)The main aim of this dissertation is the quantitative characterization of the contributions of individual fluid elements (vortices) to aerodynamic forces, explaining and quantifying the mechanisms by which both drag and ... -
Dimensionless Parameters to distinguish health from disease
Sanmiguel-Rojas, Enrique
; Burgos Olmos, Manuel A. (2018-05-17)
There are significant variations in healthy nasal airflow patterns, so it is difficult to identify a universal template for normal nasal airflow. In the case of diseased nasal cavities, the flow present even more random ... -
Efficient self-propelled locomotion by an elastically supported rigid foil actuated by a torque
López-Tello, Pablo Esteban; Fernández-Feria, Ramón; Sanmiguel-Rojas, Enrique (Elsevier, 2022-11-19)
A new theoretical model is presented for an aquatic vehicle self-propelled by a rigid foil undergoing pitching oscillations generated by a torque of small amplitude applied at an arbitrary pivot axis at which the foil is ... -
Force and torque reactions on a pitching flexible aerofoil
Sanmiguel-Rojas, Enrique; Perona, J.L.; Fernández-Feria, Ramón (Cambridge, 2023)
Experimental measurements in a wind tunnel of the unsteady force and moment that a fluid exerts on flexible flapping aerofoils are not trivial because the forces and moments caused by the aerofoil's inertia and others ... -
Numerical validation of simple non-stationary models for self-propelled pitching foils
Fernández-Feria, Ramón; Sanmiguel-Rojas, Enrique; Esteban López-Tello, Pablo (Elsevier, 2022-09-15)
High-resolution numerical simulations of the self propelled locomotion of two-dimensional pitching foils are used to assess simplified models based on linear potential theory for the fluid-foil interaction. These models are ... -
On the development of lift and drag in a rotating and translating cylinder
Martín-Alcántara, Antonio; Sanmiguel-Rojas, Enrique; Fernández-Feria, Ramón (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 ... -
On the feasibility of a flexible foil with passive heave to extract energy from low wind speeds
Fernández-Feria, Ramón; Sanmiguel-Rojas, Enrique (Elsevier, 2022-10)
We explore numerically and theoretically the capability of flexible foils elastically mounted to translational springs and dampers at the leading edge to extract energy from low-speed winds through its passive heave ... -
Propulsion enhancement of flexible plunging foils: Comparing linear theory predictions with high-fidelity CFD results
Sanmiguel-Rojas, Enrique; Fernández-Feria, Ramón (ELSEVIER, 2021-09-01)
The fluid–structure interaction of a flexible plunging hydrofoil immersed in a current is solved numerically to analyze its propulsion enhancement due to flexibility at Reynolds number 10 000. After validating with ... -
Vortex flow structures and interactions for the optimum thrust efficiency of a heaving airfoil at different mean angles of attack
Martín-Alcántara, Antonio; Fernández-Feria, Ramón; Sanmiguel-Rojas, Enrique (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 ...