A5103057341- Spacecraft and Cryogenic Technologies
- Advanced Thermodynamic Systems and Engines
- Heat Transfer and Optimization
- Superconducting Materials and Applications
- Acoustic Wave Phenomena Research
- Vibration and Dynamic Analysis
- Hydrogen Storage and Materials
- Refrigeration and Air Conditioning Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Structural Engineering and Vibration Analysis
- Fluid Dynamics and Vibration Analysis
- Zeolite Catalysis and Synthesis
- Carbon Dioxide Capture Technologies
- Psychological Well-being and Life Satisfaction
- Aeroelasticity and Vibration Control
- Transportation Systems and Logistics
- Aerodynamics and Acoustics in Jet Flows
- Aerogels and thermal insulation
- Advanced Thermoelectric Materials and Devices
- Soil Mechanics and Vehicle Dynamics
- Heat Transfer and Boiling Studies
- Advanced Materials and Mechanics
- Thermal properties of materials
- Vibration Control and Rheological Fluids
Paul Scherrer Institute
2025
University of Technology Sydney
2023-2024
University of Beira Interior
2021
Universidade Estadual Paulista (Unesp)
2006-2019
Universidade Nova de Lisboa
2009-2017
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010
Institut Nanosciences et Cryogénie
2010
Universidade do Porto
2010
Departamento de Ciência e Tecnologia
2008
The present study focuses on investigating the aerodynamic interaction between a three-element wing and wheel in ground effect, following Formula One regulation change set for 2022, among which is simplification of front wing. This was accomplished by conducting three-dimensional computational fluid dynamics analysis, using Detached-Eddy Simulation approach, simplified one-quarter model racing car. main goal to examine how changing pressure distribution, incidence second flap, affected wake....
The energetics and phase behavior of the MIL-53(Al) metal–organic framework upon low-temperature (15–260 K), subatmospheric H2 adsorption are studied experimentally using a volumetric technique theoretically by grand canonical Monte Carlo simulation. equilibrium data recorded for fixed amount in system at stable increasing temperature steps starting from 15 K while recording pressure attained each step. isotherms generated repeating experiments different amounts adsorbate connecting points...
The so‐called gas gap heat switch, in which the pressure is managed by a coupled small cryopump having no moving parts, known to be very reliable and simple switch.Mechanical design improvements can lead optimized ON or OFF characteristics of gas‐gap switch. Their conductance are mainly determined properties geometry. However, their operational temperature range limited gas‐sorbent pair adsorption characteristics. Traditionally chosen helium, since it best conductive one below 100 K, sorbent...
A gas-gap heat switch (GGHS) reaches its highest conductance state when the gap between two exchange surfaces is filled with a conducting gas in viscous regime. The broader surface and thinner gap, higher ON achieved. In this paper we describe very thin cold switchreached upon use of differential thermal expansion construction materials. Such technique overcomes intricacies manufacturing process switch. We designed built tested prototype using our new methodology. high was measured both...
Neon (Ne) is an expensive noble gas with commercial interest, which why systems for Ne storage and delivery are useful tools its more efficient utilization. Although adsorption-based technologies potential candidates the development of such systems, there have been few research efforts on study adsorption equilibria porous solids. Metal–organic frameworks (MOFs) a recent class promising materials adsorptive storage. In present work, in two most well-known MOF materials—HKUST-1 UiO-66—has...
A thermal Energy Storage Unit (ESU) could be used to attenuate inherent temperature fluctuations of a cold finger, either from cryocooler working or due suddenly incoming heat bursts. An ESU directly coupled the source acts as buffer temporarily increasing its cooling capacity and providing better stability finger ("Power Booster mode"). The energy storage units presented here use an enthalpy reservoir based on high latent liquid-vapour transition neon in range 38 - 44 K store up 900 J, that...
Abstract A tensegrity system is composed by two types of elements, tensile and compressive parts, which promotes the structural stability system, in this case parts are cables (steel cables), bars made steel. An attractive characteristic a structure capability to be deployable, for reason, interesting space applications due small volume that occupy possible transport station outside earth. In general, these structures can large with many repetitive cells. work, boom consisting ten periodic...
Cryogen-free superconducting magnet systems (CFMS) have become popular over the last two decades for simple reason that use of liquid helium is rather cumbersome and a scarce resource. Some available CFMS mechanical cryocooler as magnet's cold source. However, variable temperature insert (VTI) some existing are not strictly cryogen-free they still based on gas circulation through sample space. We designed prototype gap heat switch (GGHS) allows thermal management completely system, with no...
Abstract A solution for a “vibration-free” Joule-Thomson cooler using sorption compressor is presented to answer the needs of potential future Earth observation IR missions with low micro-vibration levels requirements from European Space Agency. The adopted includes closed cycle JT cooler, nitrogen as working fluid an expected cooling power 1.5W@80K and circulation achieved by cycles adsorption/desorption metal organic framework sorbent materials. principle chosen parameters 80 K...
Stiffened structures are widely used in aeronautics, marine and rail industries.When stiffeners integrated into host structures, so-called Bloch-Floquet waves generated due to interactions between the host's flexural stiffeners' torsional waves.It is reported literature that these often source of undesirable noise vibrations when stiffened structure excited by a force.To mitigate unwanted from this study proposes replace common rectangular with Acoustic Black Hole (ABH) stiffeners.To do...
Abstract Stiffened structures are essential for a wide range of engineering applications including aeronautics, marine and rail systems. Adding stiffeners to host structure leads generation Bloch-Floquet waves, which induced by the interaction between flexural waves in flexural/torsional stiffeners. These could generate unwanted noise vibrations should be mitigated. Acoustic black holes (ABHs) widely used as passive-control approach mitigate elastic structures. This study aims use ABHs...