Questa tesi analizza il trasporto e la distribuzione spaziale di particelle inerziali disperse in un flusso turbolento confinato da pareti e stabilmente stratificato. I flussi turbolenti carichi di particelle sono rilevanti per molte applicazioni ambientali e geofisiche, tra cui il trasporto di aerosol atmosferico, la sospensione di sedimenti, le particelle marine e la dispersione di inquinanti, contesti in cui la turbolenza, la stratificazione e la gravità influenzano congiuntamente il moto ...
Questa tesi affronta la progettazione aerodinamica di una configurazione ad ala volante basata sulla distribuzione di portanza a campana, Bell shaped lift distribution (BSLD), con l'obiettivo di identificare un'architettura alare che sia aerodinamicamente efficiente, intrinsecamente stabile, controllabile e concretamente realizzabile. Dopo una ricostruzione del quadro teorico che collega la teoria della linea portante di Prandtl ai successivi sviluppi sulla distribuzione a campana e alla sua ...
In recent years, bio-inspired sinusoidal leading-edge wing geometries have attracted significant attention
due to their potential as passive flow control devices. This design concept is inspired by the
pectoral flippers of humpback whales, whose characteristic tubercles enable these large cetaceans
to perform incredibly agile maneuvers. Previous studies have shown that leading-edge tubercles
generate streamwise vortices that can delay flow separation and enhance aerodynamic performance
depend...
Wave propagation in heterogeneous materials, such as aluminum or composite materials, is affected by singularities in the mechanical properties arising from changes in the constituent phases. Classical mechanics describes this phenomenon using local equations that are valid only in regular domains; when singularities are present, however, the partial derivatives on which these equations rely are no longer well-defined.
To overcome this limitation, a nonlocal peridynamic model for a one-dime...
Aerodynamic optimization of a three-element Formula 1 rear wing with active aerodynamics
The increasing congestion of the near-Earth orbital environment makes space debris a major threat to the sustainability and reliability of space missions. While large objects can be tracked and considered in collision avoidance strategies, non-trackable debris still represents a critical risk, since even millimetre- or sub-millimetre-sized particles can damage spacecraft surfaces, structures, and internal components. In this context, impact sensors can provide valuable in-orbit information on...
The design of high-performance Unmanned Aerial Vehicles (UAVs) for competitions that require the maximization of the payload fraction, such as the Air Cargo Challenge (ACC), requires lightweight composite structures. However, the resulting mass-efficient wings possess reduced flexural and torsional rigidities, rendering them highly susceptible to dangerous fluid-structure interactions such as aeroelastic flutter. While low-fidelity aerodynamic tools neglect flow unsteadiness and high-fidelity...
Solvated electrons (SEs) are free electrons produced in a liquid medium and surrounded by solvent molecules. They have a high reduction potential of about −2.9 V vs. Normal Hydrogen Electrode (NHE), which enables challenging reactions under mild conditions. Examples include the nitrogen reduction reaction (NRR) to ammonia, the carbon dioxide reduction reaction (CO₂RR), and the degradation of persistent halogenated organic pollutants. Optimizing the reduction of these species is a key objectiv...
Le strutture carboniose unidimensionali basate su atomi di carbonio ibridati sp rappresentano una classe di materiali di crescente interesse nell’ambito della sintesi on-surface, un approccio che consente la costruzione controllata di architetture covalenti su superfici metalliche e la loro caratterizzazione a risoluzione atomica. In questo contesto si inserisce lo studio di sistemi strutturalmente affini al grafino e al grafdiino, materiali ampiamente investigati per le loro peculiari propri...
Quantum engineered systems offer remarkable opportunities to identify quantum phases, including topological states of matter. A prominent example is the Peierls instability, already known to occur in quantum materials long-known to occur via coupling to phonons. Recent investigations have shown that a similar mechanism can be identified in quantum simulators by coupling strongly-interacting bosons to qubits via a Z2 theory. Current developments in quantum simulation and computing have recentl...
