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Instituto Superior de Espinho
Country: Portugal
201 Projects, page 1 of 41
  • Funder: European Commission Project Code: 255216
  • Funder: European Commission Project Code: 101065184
    Funder Contribution: 172,619 EUR

    Electronic products are progressively smaller and more powerful, resulting to an exponential increase in the generated residual heat. Their effective and environmental-friendly cooling is therefore, of upmost importance for many applications such as Data Centres, Fuel Cells, Insulated-Gate Bipolar Transistors, Lithium-Ion Batteries and Photovoltaic Cells, with a market value of several billions of dollars worldwide. Flow Boiling within micro-passages has been proven as one of the most efficient cooling strategies for such High-Power Density Electronics. However, such solutions, are not yet commercially available. This is due to a lack of a deep understanding of the underpinned flow and transport processes and unresolved ambiguities in micro-scales and hence, of reliable and easy-to-use thermal design tools for small-scale components. REFINE aims to give light at such crucial ambiguities, utilising a synergic combination of novel Volume Of Fluid (VOF) based numerical simulations and tailored high-resolution experimental diagnostics. Dr Andredaki will develop a novel cutting-edge simulation tool starting from an already enhanced VOF solver that she has been developing in the last years. This will be validated against parallel advanced experimental measurements on flow boiling, that she will perform using single and multiple parallel micro-channel heat sinks. The final optimised and validated numerical solver will then be applied for a wide series of parametric simulations that in combination with additional laboratory measurements will form a unique database that will lead to the development of novel, physics-based design correlations for flow boiling micro-channel heat sinks. The word-leading expertise of Prof. Moreira, who will supervise this project, on the experimental techniques for microscale boiling, guarantees the highest level of knowledge transfer, enabling Dr Andredaki to further develop her skills and enhance her future career opportunities in academia.

  • Funder: European Commission Project Code: 101132290
    Funder Contribution: 156,779 EUR

    One of the priorities of the 2030 Agenda is to achieve a sustainable development path to balance environmental, social and economic needs for present and future generations. The United Nations Sustainable Development Goals (SDGs) are the blueprint to achieve a better and more sustainable future. The Green Deal is the roadmap towards the application of the 2030 Agenda and the SDGs in all European policies. In this context, the European construction industry faces great challenges that need real solutions. On the environment side, it is clearly a sector with an unsustainable environmental profile that will need to overcome the traditional linear path of production and consumption to adopt a Circular Economy model and Energy Efficient solutions. The number of studies on new sustainable solutions to minimize the incorporation of processed raw materials or improve thermal insulation properties of mortar have increased. Examples relate to the use of stone sludge waste from the cutting process as filler in rendering mortars or fibres from textile waste to reduce its cracking or to the increased insulation of rendering mortars through the incorporation of cork (recycled by-product of the cork industry) or silica-based aerogels (nano-structured material) as lightweight aggregates. However, studies focused on combination stone sludge waste, textile waste, recycled cork together with aerogel in mortars have not been found in the current literature. The main objective of the Eco-Mortar 2.0 project is to develop an eco-friendly and high-performance thermal insulating fibre reinforced rendering mortar for wall exterior retrofitting or wall panels coating of buildings by using diabase sludge from stone cutting as filler, recycled cork and aerogel granules as lightweight aggregates and textile waste as fibres. This mortar will decrease the use of non-renewable natural resources, improve thermal insulation and allow shrinkage cracking control.

  • Funder: European Commission Project Code: 715734
    Overall Budget: 1,179,500 EURFunder Contribution: 1,179,500 EUR

    A classical problem in the field of interacting particle systems (IPS) is to derive the macroscopic laws of the thermodynamical quantities of a physical system by considering an underlying microscopic dynamics which is composed of particles that move according to some prescribed stochastic, or deterministic, law. The macroscopic laws can be partial differential equations (PDE) or stochastic PDE (SPDE) depending on whether one is looking at the convergence to the mean or to the fluctuations around that mean. One of the purposes of this research project is to give a mathematically rigorous description of the derivation of SPDE from different IPS. We will focus on the derivation of the stochastic Burgers equation (SBE) and its integrated counterpart, namely, the KPZ equation, as well as their fractional versions. The KPZ equation is conjectured to be a universal SPDE describing the fluctuations of randomly growing interfaces of 1d stochastic dynamics close to a stationary state. With this study we want to characterize what is known as the KPZ universality class: the weak and strong conjectures. The latter states that there exists a universal process, namely the KPZ fixed point, which is a fixed point of the renormalization group operator of space-time scaling 1:2:3, for which the KPZ is also invariant. The former states that the fluctuations of a large class of 1d conservative microscopic dynamics are ruled by stationary solutions of the KPZ. Our goal is threefold: first, to derive the KPZ equation from general weakly asymmetric systems, showing its universality; second, to derive new SPDE, which are less studied in the literature, as the fractional KPZ from IPS which allow long jumps, the KPZ with boundary conditions from IPS in contact with reservoirs or with defects, and coupled KPZ from IPS with more than one conserved quantity. Finally, we will analyze the fluctuations of purely strong asymmetric systems, which are conjectured to be given by the KPZ fixed point.

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  • Funder: European Commission Project Code: 268172
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