| publications-5161 |
Article |
2022 |
Ciampolini M.; Balduzzi F.; Romani L.; Bellucci L.; Bianchini A.; Ferrara G. |
Development of an improved and versatile 2D+t modelling methodology for planing crafts |
Ocean Engineering |
10.1016/j.oceaneng.2022.112617 |
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The availability of accurate numerical tools for predicting the energy consumption of recreational crafts is pivotal in view of reducing the environmental impact on local waters. A computationally efficient digital twin capable of accurately predicting the boat resistance is thus required to account for the energy fluxes. In the study, an improved 3-DOF (Degree-of-freedom) 2D + t approach, aimed at predicting the forward resistance of a planing craft in waves and wind conditions is developed and validated. With respect to the existing literature models, a simplified methodology to account for diffraction forces is proposed, together with a novel approach for the estimation of the transom effects on drag and lift forces. A throughout comparison of model results with literature data of different planing hulls is presented, showing the potential of the proposed methodology. The developed model was applied to a 10 m flybridge test case, also including the effects of wind resistance. To this purpose, a dedicated CFD (Computational fluid dynamics) analysis of the freeboard aerodynamics has been attained and correlations for lift and drag coefficients are proposed. In addition, the potential of the proposed methodology is shown also in terms of passenger comfort by assessing the habitability under different wave conditions. Β© 2022 Elsevier Ltd |
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| publications-5162 |
Article |
2023 |
Barrett T.R.; Bamford M.; Bowden N.; Chuilon B.; Deighan T.; Efthymiou P.; Gorley M.; Grant T.; Horsley D.; Kovari M.; Tindall M. |
CHIMERA Fusion Technology Facility: Testing and Virtual Qualification |
Fusion Science and Technology |
10.1080/15361055.2022.2147766 |
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The Combined Heating and Magnetic Research Apparatus (CHIMERA) fusion technology test facility is under construction. The facility will be uniquely capable of semi-integral testing of fusion materials and component modules up to the size of the ITER test blanket module box, under combined conditions of in-vacuum high heat flux, static and pulsed magnetic fields, and high-temperature/high-pressure water cooling. This paper reports the high-level capabilities of the CHIMERA baselined design and the planned program of testing and describes the proposed strategy for use of simulations for virtual testing, qualification, and in-situ monitoring. The first step in testing of a component mock-up is to take data from as-built geometry and other measurements and transmit them to an integrated computational model that can closely mimic the physical asset and form a digital replica. Not only can this digital replica be queried in advance of physical testing in the facility, allowing optimization of the test program, but combined with subsequent test data, it also can deliver much greater insight into experimental results than can be obtained using test data alone. The digital replica is used as the basis for a digital twin, which is live coupled to the running experiment, and is under development as a proposed key facet of fusion reactor surveillance in-service. Physical mock-ups for testing can be subjected to in-vacuum heat flux up to 0.5Β MW/m2 over the entire surface while within a strong horizontal magnetic field. The central field can be up to 4Β T with a peak in the test region of 5Β T. The same component mock-ups can also be subjected to repeated magnetic field pulses with ramp rate 12Β T/s, which can simulate loading conditions of a plasma disruption. Facility upgrades are underway to include a liquid metal circulation loop to allow the study of magnetohydrodynamics effects and to add a high-heat-flux system using a very high-power continuous-wave laser to achieve divertor-relevant heat fluxes of 20Β MW/m2 over the area of a small-scale mock-up. Four examples are given to illustrate the physical testing program that is currently foreseen. Β© 2023 The Author(s). Published with license by Taylor & Francis Group, LLC. |
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| publications-5163 |
Note |
2022 |
Karmous-Edwards G.; Tomic S.; Cooper J.P. |
Developing a Unified Definition of Digital Twins |
Journal - American Water Works Association |
10.1002/awwa.1946 |
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[No abstract available] |
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| publications-5164 |
Article |
2023 |
De Leon J.A.R.; Concepcion R.S., II; Billones R.K.C.; Baun J.J.G.; Custodio J.M.F.; Vicerra R.R.P.; Bandala A.A.; Dadios E.P. |
Digital Twin Concept Utilizing Electrical Resistivity Tomography for Monitoring Seawater Intrusion |
Journal of Advanced Computational Intelligence and Intelligent Informatics |
10.20965/jaciii.2023.p0012 |
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Electrical resistivity tomography (ERT) has been seen as an appropriate instrument in several works to monitor and aid in the control of seawater intrusion (SWI) in coastal groundwater systems. This study seeks to discuss the synthesis of a digital twin that couples information between the physical space through ERT as a monitoring sensor and the digital space using SWI simulations to accurately model the behavior of SWI in the present and future settings. To showcase the concept, a Python-based simulation was presented that shows (a) the joint forward modeling-simulation scheme for calculating expected ERT apparent resistivity values from simulated SWI and (b) the calibration of the digital coastal aquifer system through genetic algorithm to accurately match the outputs of the SWI simulations with the ERT measurements. Β© Fuji Technology Press Ltd. |
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| publications-5165 |
Conference paper |
2022 |
Dumont A. |
A COMBINATION OF ADVANCED PHOTOGRAMMETRY AND LASER TRIANGULATION TECHNIQUES (VIDEO LASER SCAN™) FOR THE FREE-FLYING 3D INSPECTION OF SUBSEA ASSETS |
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives |
10.5194/isprs-archives-XLIII-B2-2022-929-2022 |
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Over the last years, High-Definition (HD) video cameras have made visual inspections of subsea assets more efficient and a source of massive and critical information. But in many cases, this visual information is incomplete without dimensions and geometry and can be biased by the wrong optical perspective, the lack of scale, or bad water clarity.This paper will describe the development of a new Technology, called Video Laser Scanβ„Ά (or VLSβ„Ά), based on the combination of Photogrammetry and Laser Triangulation techniques, that provides additional Intelligence to such subsea inspections. In addition, we will highlight the innovation recently brought by Artificial Intelligence and 3D Holograms. Β© 2022. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives. All rights reserved. |
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| publications-5166 |
Article |
2022 |
SchΓΌtt M.; Stamatopoulos K.; Batchelor H.K.; Simmons M.J.H.; Alexiadis A. |
Development of a digital twin of a tablet that mimics a real solid dosage form: Differences in the dissolution profile in conventional mini-USP II and a biorelevant colon model |
European Journal of Pharmaceutical Sciences |
10.1016/j.ejps.2022.106310 |
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The performance of colon-targeted solid dosage forms is commonly assessed using standardised pharmacopeial dissolution apparatuses like the USP II or the miniaturised replica, the mini-USP II. However, these fail to replicate the hydrodynamics and shear stresses in the colonic environment, which is crucial for the tablet's drug release process. In this work, computer simulations are used to create a digital twin of a dissolution apparatus and to develop a method to create a digital twin of a tablet that behaves realistically. These models are used to investigate the drug release profiles and shear rates acting on a tablet at different paddle speeds in the mini-USP II and biorelevant colon models to understand how the mini-USP II can be operated to achieve more realistic (i.e., in vivo) hydrodynamic conditions. The behaviour of the tablet and the motility patterns used in the simulations are derived from experimental and in vivo data, respectively, to obtain profound insights into the tablet's disintegration/drug release processes. We recommend an β€_x009c_on-offβ€_x009d_ operating mode in the mini-USP II to generate shear rate peaks, which would better reflect the in vivo conditions of the human colon instead of constant paddle speed. Β© 2022 |
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| publications-5167 |
Conference paper |
2022 |
Langenheim N.; Sabri S.; Chen Y.; Kesmanis A.; Felson A.; Mueller A.; Rajabifard A.; Zhang Y. |
ADAPTING A DIGITAL TWIN TO ENABLE REAL-TIME WATER SENSITIVE URBAN DESIGN DECISION-MAKING |
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives |
10.5194/isprs-archives-XLVIII-4-W4-2022-95-2022 |
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Landscape architects and urban designers are often tasked with decision-making about implementation of flood moderating measures in urban renewal projects. These decisions require consideration of complex interdependent existing and proposed infrastructure and must be informed by data and modelling from multiple disciplines such as hydrologists transport engineers and urban planners. Here we describe the challenges of integrating these data and modelling from both GIS and BIM sources into a framework that could support flood moderation decision-making embedded within a spatially enabled Digital Twin. Our findings outline some of the considerable adjustments to future data collection methods that will be required to enable such a decision-support framework. Furthermore we outline the requirements of the framework for employability in stakeholders and community decision-making forums. We test this framework on a large-scale urban renewal precinct in Melbourne Australia with well recognised current and future flooding issues. Copyright Β© 2022 N. Langenheim et al. |
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| publications-5168 |
Article |
2022 |
SΓΈrensen J.V.; Ma Z.; JΓΈrgensen B.N. |
Potentials of game engines for wind power digital twin development: an investigation of the Unreal Engine |
Energy Informatics |
10.1186/s42162-022-00227-2 |
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Digital twin technologies have become popular in wind energy for monitoring and what-if scenario investigation. However, developing a digital representation of the wind is challenging, especially due to the digital twin platform constraints. Game engines might be possible to solve this issue, especially since game engines have been used for product design, testing, prototyping, and also digital twins. Therefore, this study investigates the potential of developing a digital twin of wind power in the Unreal game engine. A case study of two types of wind turbines (Vestas V164-8 and Enercon E-126 7.580) and one location (Esbjerg, Denmark) is chosen for this study. The digital twin includes the environment with historical wind data and the visual representation of the wind turbine with a wind power production model and the estimated production in the given wind conditions of the area. The results show that game engines are viable for building entire digital twins where a realistic graphical user interface is required. Unreal Engine 5 provides the tools for modelling the landscape, surrounding water, and lighting. In addition, the Unreal Engine ecosystem provides vast amounts of content, such as 3D assets and game logic plugins, easing the digital twin development. The results prove that digital twins built in Unreal Engine 5 have great potential development of digital twins and user interfaces for communicating with a digital twin. The developed digital twin allows for further extension to benefit future digital twins utilizing wind turbines. Β© 2022, The Author(s). |
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| publications-5169 |
Conference paper |
2022 |
Dulaimi A.; Hamida R.; Naser M.; Mawed M. |
DIGITAL TWIN SOLUTION IMPLEMENTED ON ENERGY HUB TO FOSTER SUSTAINABLE SMART ENERGY CITY, CASE STUDY OF SUSTAINABLE SMART ENERGY HUB |
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
10.5194/isprs-annals-X-4-W3-2022-41-2022 |
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The scarcity of energy is one of humanity's most pressing issues in the twenty-first century. These problems can be found in various areas, including energy supply, exchange, and consumption. Population growth, rising global energy demand, natural resource shortages, and environmental concerns contribute to energy scarcity. Furthermore, energy shortage needs the expansion of renewable energies and energy efficiency, a major concern for all governments and organisations. Building energy efficiency is a crucial concept to consider when it comes to smart cities. Buildings are the greatest energy consumers, accounting for 40% of total energy consumption. Recent advances in machine learning within a big data context have paved the way for more efficient building energy management. Building energy consumption may be successfully managed by a real-time measurement procedure, allowing the economy to shift from a linear to a circular consumption model. This will tackle the issue of late notice of failed energy-saving initiatives and allow for immediate correction to restore the energy management system to ultimate performance.</p><p>The energy hub might be as small as a single home energy system or as large as an energy system for the city. This paper will present a case study on developing a smart energy hub called Hubgrade 4.0 that relies on connected products using digital twin as a significant enabler for energy-saving initiatives. Hubgrade 4.0 provides an innovative approach to successfully implementing energy efficiency improvement using artificial intelligence and real-time data. Hubgrade 4.0 is the name of Enova by Veolia smart energy hub; Enova is the regional leader in integrated energy and multi-technical services, delivering performance-based energy and facilities management solutions. The energy hub digital twin is a link between a physical platform that administers the energy hub's IoT and a virtual platform that can derive services that are valid for the energy hub. Successful enterprises are using several new technologies to achieve the goals of Industry 4.0: efficiency, speed, agility, and customer-centricity. This paper concluded and highlighted lessons learned from the successful implementation of innovative energy management, which relied on a dedicated organisation, effective adoption of digital technologies, and embracing new business models, resulting in power savings of 254 million kW and water savings of around 3 million cubic meters, as well as financial savings of about 138 million AED in 5 years since Hubgrade 4.0 started operations its first energy-saving contract in 2017. Β© Author(s) 2022. |
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| publications-5170 |
Conference paper |
2023 |
Lewis G.; Snider B.; Vamvakeridou-Lyroudia L.; Chen A.S.; Djordjević S.; Savić D.A. |
Developing water monitoring solutions with FIWARE defining, creating, populating, and extending digital twins |
IOP Conference Series: Earth and Environmental Science |
10.1088/1755-1315/1136/1/012003 |
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The water industry is often and unfairly criticised for being relatively slow to adopt IT as part of its operating processes. To address this, the FIWARE and Fiware4Water projects were tasked with developing open-source data definition, management, and processing, and applying it to the water sector. In this work, we are reviewing our experiences with developing FIWARE-based solutions for the aqua3s[1] and Fiware4Water[2] projects across the whole project lifecycle, from our initial of installing and learning to work with FIWARE context brokers[3], through building and maintaining synthetic digital twins for load and edge-case testing development and debugging and finally looking at longer-term data management and archiving. Through our work on these projects, we have started to develop a wealth of best-practice, strategic choices, and approaches to be avoided for successful and long-term context broker usage. Β© 2023 Institute of Physics Publishing. All rights reserved. |
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