Descripción del proyecto
Los campos magnéticos superpuestos pueden optimizar el control de los fluidos magnéticos inteligentes
Los fluidos magnetoreológicos (MR) son materiales inteligentes compuestos por partículas ferromagnéticas en un fluido portador. Las propiedades de los fluidos MR, en particular su viscosidad, pueden controlarse mediante la aplicación de un campo magnético. Esto hace que sean útiles en una gran variedad de aplicaciones en campos como la ingeniería civil, las industrias automovilística y aeroespacial y la biomedicina. La aplicación de campos magnéticos multiaxiales superpuestos podría mejorar considerablemente el control de las propiedades de los fluidos MR. Con el apoyo de las Acciones Marie Skłodowska-Curie, el equipo del proyecto MAMFRHE está caracterizando toda la respuesta reológica de los fluidos MR sometidos a dichos campos mediante una campaña teórica y experimental.
Objetivo
The full rheological response of magnetorheological (MR) fluids will be investigated under unsteady multiaxial magnetic fields for the first time. Such fields are able to drive the MR fluid to minimum energetic states. Thus, we hypothesize that the superposition of multiaxial fields will constitute a relatively easy and straightforward mechanism to optimize MR fluid performance (contrary to current optimization routes, mainly based on complex schemes to tailor MR fluid constituents). The project will assess the MR fluid behavior in both pre-yield and post-yield regimes. In the two cases, bulk rheological properties (viscoelastic moduli, viscosity and normal stresses) will be investigated in terms of the particle microscale structure and dynamics, formation of percolating particle networks at rest or (expected) lamellar structures under steady flow. To do so, the problem will be tackled firstly from a numerical point of view at the Partner Organization. MR fluids will be modelled implementing direct contact forces between particles, hydrodynamics and unsteady magnetic multiaxial interactions using Molecular and Stokesian Dynamics. Secondly, the results from these computational studies will be corroborated through experiments at the Hosting Institution using a custom-built high-speed confocal magneto-rheomicroscope. This consists of a high-speed confocal rheomicroscope coupled to a unique magnetic field generator that allows, at the same time, visual access to the sample and the generation of unsteady multiaxial fields. With this novel and comprehensive project, it is intended to open a new branch in the magnetorheology research field, testing the ability of multiaxial fields to improve MR performance and promote their exploitation in novel or current applications.
Ámbito científico
- natural sciencesmathematicsapplied mathematicsmathematical physics
- natural sciencesmathematicsapplied mathematicsdynamical systems
- engineering and technologymaterials engineering
- natural sciencesmathematicsapplied mathematicsnumerical analysis
- natural sciencesmathematicsapplied mathematicsmathematical model
Programa(s)
Régimen de financiación
MSCA-IF-GF - Global FellowshipsCoordinador
18071 Granada
España