1,692 research outputs found
Analysis and simulation of a powders dissolution system based on the hydrodynamic controlled cavitation
No full textAnalysis and Simulation of a Powders Dissolution System based on Hydrodynamic Controlled Cavitation.
No full textFood powder dissolution is a process frequently adopted for beverages production. Among the different powder dissolution methods tested in literature, Hydrodynamics Controlled Cavitation is one of the most promising, giving the same effect of ultrasounds, with a lower overall cost. With the purpose to try this technology, specific equipment has been designed and tested. The designed system is based on the Venturi effect, able to generate a hydrodynamic controlled cavitation in the diverging section. Given the system, the main aim of the present work is to develop a CFD simulation of this hydrodynamic cavitation system for food powders dissolution and perform experimental tests in order to validate it. Simulation is able to verify the presence of cavitation, calculate the cavitation number and, finally, define how the cavitation effect changes with the injection of air. Multicomponent
fluid flow setting has been used for the simulation, with the addition of a cavitation module implemented in Ansys CFD Software version 14.5.
Simulations and experimental tests are performed considering a concentration of powders in a range of 1-3% respect to the water. Selected powders are off-white blend of food grade stabilizers and food grade CMC that are particularly useful for thickening and stabilizing of beverages. Results show the cavitation’s presence in the diverging section of the Venturi system and a good agreement between simulation analysis and experimental results in fluid dynamic parameters (relatives to pressure, velocity and volume fraction of powders). Finally a correlation between the dissolution level and the cavitation effect has been obtained showing how the proposed multicomponent CFD model can be useful to define the optimum process condition
CFD simulation of a retort process for food vegetable products
No full textThis work aims at simulating a retort sterilization process of flexible packaging, performed in “autoclave”. The retort sterilization is one of the most adopted processes in order to reduce the microbial load of packaged food.
Ansys CFD© software has been used in this study in order to simulate the heat transfer inside the retort room. Flexible packaging filled with a particular vegetable soup have been modelled. 3D geometrical
configuration of the equipment has been also modelled in order to evaluate the sterilization level reached by each flexible packaging inside the retort room. In particular, the internal temperature of the most
disadvantaged simulated product has been monitored during 5 minutes of the process in order to control the time/temperature trend.
Finally the model has been validated by comparing the simulation results with those obtained by experimental tests
Modelling and multiobjective optimization of the VHP sterilization process of pouch packaging
No full textAseptic filling technology of Spouted Pouch packaging,
even more used in the beverages sector, requires a very
complex sterilization and rinsing of the packaging
before filling.
This work aims to optimize the sterilization
process of a pouch packaging used in aseptic
technology. Starting from a fixed position of the nozzle
inside the pouch, this work goals to varying the flow
rate through the nozzle and the process time, in order to
ensure the contact between H2O2 solution and all zone
of the packaging wall, so to optimize the sterilization
process. The analysed sterilization process adopts a
mixture composed by vaporized hydrogen peroxide and
hot sterile air.
This problem has been resolved using a multiobjective
optimisation with the mains objectives to
minimize the consumption of H2O2 and the relatives
costs and maximize the sterilization efficacy on the
packaging volume in a defined time
TUTELA DEL LAVORO E LIBERTA' D'IMPRESA NEI PROCESSI DI ESTERNALIZZAZIONE
No full textL’elaborato analizza le conseguenze lavoristiche della successione fra imprenditori, muovendo da una ricognizione delle varie tipologie di esternalizzazione con le relative esigenze e principali criticità.
L’indagine si concentra in primo luogo sul trasferimento d’azienda, esaminando la normativa e la giurisprudenza europee per passare poi alla disciplina di diritto interno, alle procedure sindacali e a uno specifico focus sul trasferimento delle aziende in crisi.
Successivamente l’autore si sofferma sull’appalto, prendendone in particolare considerazione gli indici di genuinità, i criteri di distinzione dalla somministrazione illecita di manodopera e la tutela delle maestranze in caso di avvicendamento fra imprese.
Da ultimo, la ricerca approfondisce le c.d. “clausole sociali”, sia di prima che di seconda generazione, valutandone la compatibilità con il diritto eurounitario e con la costituzione nonché riflettendo sui possibili rimedi in caso di loro violazione.The author analyzes the labour consequences of the succession between entrepreneurs, starting from a recognition of the various types of outsourcing with the related needs and main critical issues.
The survey focuses primarily on the transfer of businesses, examining European legislation and case-law and then moving on to internal legislation, trade union procedures and a specific focus on the transfer of companies in crisis.
The author then dwells on the contract, taking into account in particular the indications of authenticity, the criteria of distinction from the illicit administration of labour and the protection of workers in the event of turnover between companies.
Finally, the research deepens the "social clauses", both first and second generation, assessing their compatibility with European law and with the constitution and reflecting on possible remedies in case of their violation
Ultra Low Carbon Vehicles: New Parameters for Automotive Design
No full textAs the influence of vehicle emissions on our environment has become better understood, the UK government has recently placed urgent emphasis on the implementation of low carbon
technologies in the automotive industry through: the UK Low Carbon Industrial Strategy. The overall objective is to offer big incentives to consumers and support for the development of infrastructure and engineering solutions. This scheme however does not consider how the development of functional and experiential user value might drive consumer demand, contributing to the adoption of low carbon vehicles (LCVs) in the mass market.
With the emergence of the North East of England as the UK’s first specialised region for the development of ultra-low carbon vehicles (ULCVs), ONE North East, as a development agency for the region's economic and business development, and Northumbria University Ideas-lab have supported a project to facilitate innovation through the collaboration of technology, research and development (R&D) and business. The High Value Low Carbon (HVLC) project aims to envisage
new user value made possible by the integration of low carbon vehicle platforms with new process and network technologies. The HVLC consortium represents vehicle manufacturers and their suppliers as well as technology based companies and through an ongoing process of design concept generation the project offers a hub for innovation led enterprise.
Whilst new technological developments in areas such as power generation, nano materials, hydrogen fuel cells, printed electronics and networked communications will all impact on future automotive design, the mass adoption of low carbon technologies represents a paradigm shift for the motorist. This paper aims to describe how the mapping of new parameters will lead to new transport scenarios that will create the space for new collaborative research on user experiences supported by innovative technologies and related services
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Matteo Maria Boiardo (1441-1494)
No full textMatteo Maria Boiardo – contemporary of Sir Thomas Malory and forerunner of Shakespeare, Spenser, Milton, Cervantes, Tolkien, and C.S. Lewis – is best known as the author of the Orlando Innamorato [Orlando in Love], a poem in ottava rima organically merging Carolingian epic and Arthurian romance. He was also a lyric and pastoral poet, playwright, and translator of classical texts into the Italian vernacular. Matteo was active in Italy during the years of 1463 throughout 1494, the year of his death
Uno sguardo all'Est. Lavoro e diritti fondamentali in Russia e negli altri Paesi della Comunità di Stati indipendenti
No full textNel contributo l'autore, dopo aver esaminato i diritti fondamentali del lavoro presenti nelle Costituzioni dei Paesi della Comunità di Stati indipendenti, si sofferma sul diritto del lavoro russo. La trattazione, a carattere diacronico, abbraccia i rami principali del diritto del lavoro: il rapporto individuale, le relazioni collettive, il mercato del lavoro. L'autore rileva una sorprendente continuità nelle linee essenziali del diritto del lavoro russo, pur nel susseguirsi di sistemi socioeconomici completamente diversi. Egli conclude che il diritto del lavoro russo appartiene saldamente alla matrice europea della materia.The contribution of the author starts by examining fundamental labour rights recognised by the Constitutions of the Countries of the Community of Independent States. Then the author focuses upon Russian Labour Law, going through the history of the main branches of the discipline: the individual relationship, industrial relations, the labour market. The article finds a surprising continuity in the essential lines of Russian Labour Law, in spite of the completely different socio-economic systems that were experimented in Russia during the twentieth century. The author concludes that Russian Labour Law clearly belongs to the European matrix of the discipline
Corpo, spazio, architettura. Fenomenologia dell’esperienza spaziale Matteo Vegetti, Fabrizia Bandi (eds.), Editrice Morcelliana, Brescia 2024
No full textThe author reviews "Corpo, spazio, architettura: Fenomenologia dell’esperienza spaziale," edited by Matteo Vegetti and Fabrizia Bandi. The book examines the philosophical underpinnings of spatial experience through a phenomenological lens, engaging with both traditional and contemporary notions of how space, body, and architecture interconnect. The author highlights the text\u27s exploration of how architects and designers might integrate phenomenological insights into their work, transforming space from mere physical dimensions into lived, experienced reality. The review appreciates the book’s thematic organization, which starts with foundational theories from Merleau-Ponty and expands through discussions on virtual spaces and the future of architecture in the digital age. Through this anthology, readers gain a comprehensive view of the architectural implications of phenomenological thought, making it a critical resource for anyone involved in the conceptualization and design of space
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