A5049653421- Cardiac Valve Diseases and Treatments
- Fusion materials and technologies
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Ultrasonics and Acoustic Wave Propagation
- Hydraulic flow and structures
- Coronary Interventions and Diagnostics
- Fluid Dynamics and Turbulent Flows
- Hydraulic and Pneumatic Systems
- Structural Health Monitoring Techniques
- Antiplatelet Therapy and Cardiovascular Diseases
- Nuclear Engineering Thermal-Hydraulics
- Blood properties and coagulation
- Cardiovascular Function and Risk Factors
- Force Microscopy Techniques and Applications
- Nuclear reactor physics and engineering
- Spacecraft and Cryogenic Technologies
- Fluid Dynamics and Vibration Analysis
- Combustion and Detonation Processes
- Elasticity and Material Modeling
- Atrial Fibrillation Management and Outcomes
- Drilling and Well Engineering
- Particle accelerators and beam dynamics
- Fluid Dynamics Simulations and Interactions
- Nuclear Materials and Properties
Vitrociset (Italy)
2018-2022
Space (Italy)
2018-2022
Sapienza University of Rome
2013-2018
Tecnologia Energia Ambiente Materiali (Italy)
2014
Politecnico di Milano
2007-2009
Polytechnic University of Turin
2004-2006
National Interuniversity Consortium for the Physical Sciences of Matter
2006
The need to optimize the thrombogenic performance of blood recirculating cardiovascular devices, e.g., prosthetic heart valves (PHV) and ventricular assist devices (VAD), is accentuated by fact that most them require lifelong anticoagulation therapy does not eliminate risk thromboembolic complications. formation thromboemboli in flow field these potentiated contact with foreign surfaces regional phenomena stimulate clotting, especially platelets. With lack appropriate methodology, device...
Different materials with mesoscopic characteristics (e.g., defects or intergrain regions) have been shown to share a peculiar elastic behavior when subject temperature variations. We present here simple model based on the description of features as bistate bond regions that connect portions described by traditional Landau thermoelastic theory. apply our simulate resonance frequency experiments in order analyze effects changes properties and reproduce part phenomenology observed concerning...
For the future development of Generation IV nuclear reactors, both safety and economic targets have to be achieved. In order increase, at same time, power density generation features, a huge R&D effort is still required. Referring especially Liquid Metal Cooled Fast Reactors, much attention placed on Gas Entrainment (GE) phenomena, which could cause unlikely positive reactivity insertion accident. The GETS experimental facility (Gas Test Section), aimed studying free surface vortices...
A plant prototype for whole scrap tires disposal and the consequent syngas production via pyrolysis has been developed. numerical analysis on innovative reactor, constituted by an autoclave closing device explosion-proof water system carried out. The aim of this is to investigate fluid-dynamics in chamber model production. simulations, performed pre-realization phase, have allowed determine: i) flow field fluid within so as optimize geometry (e.g. size, vacuum system, tank); ii) temperature...
Nonlinear acoustic techniques have proven to be extremely sensitive for damage detection in structural materials or composites. Damage characterization, however, also involves localization and quantification, as well detection. For this purpose, models developed describe the response of localized (due micro-features) excitation may help study influence on specimen resonance frequency position, length level defective region. We present here some numerical results show how nonlinear...
A numerical evaluation of gas core length in free surface vortices had been performed, applying different approaches. In the past only partial satisfactory agreement with experimental results was obtained because an excessive simplification computational domain. this work, two-phase CFD simulations (with Volume Of Fluid method) have performed using a domain without any and evolution vortex formation has analyzed term length. Different turbulence models tested. mesh sensitivity analysis...
The formation and evolution of free surface vortices represent an important topic in many hydraulic intakes, since strong whirlpools introduce swirl flow at the intake, could cause entrainment floating matters gas. In particular, gas phenomena are safety issue for Sodium cooled Fast Reactors, because introduction bubbles within core causes dangerous reactivity fluctuation. this paper, a numerical evaluation length is presented, according to two different approaches. first one, prediction...
The Preisach-Mayergoyz (PM) approach has been widely used to describe hysteresis in different fields. Among these, various types of reversible hysteretic elastic behavior have succesfully modeled, inclusing quasi-static, fast and slow dynamics, modulation, so on. Here, we propose an extend the PM formulation also treat irreversible phenomena, such as fatigue damage progression. For this purpose, introduce a multilevel scheme based on nested descriptions. mathematical is outlined...
The interaction of the liquid metal with plasma confinement magnetic field constitutes a challenge for design fusion reactor blankets, due to arise MHD effects: increased pressure drops, heat transfer suppression, etc. To overcome these issues, dielectric fluid can be employed as coolant breeding zone. A typical configuration involves pipes transverse flow direction. This numerical study is conducted assess influence pipe conductivity on and transfer. CFD code ANSYS CFX was this purpose....
A phenomenological model for platelet cumulative damage was developed to express the activation state (PAS) in response a specific shear stress loading waveform. genetic algorithms (GAs) were used identification. The fine-tuned using parameters obtained vitro by application of waveform Hemodynamic Shearing Device (HSD). PAS measured temporally modified prothrombinase method. proposed analytical and prediction agree well with follow same trend as experimental results.
During the last fifty years, several studies have been performed on free surface vortex formation and evolution, different analytical models developed. In a previous work, three were analyzed discussed to evaluate limits strong points of each one. this paper same considered compared with experimental results obtained for horizontal planes by means Particles Image Velocimetry technique. Mean velocity fields measured test case, highlighting flow field differences at heights rates. Experimental...