Search results for "FD"
showing 10 items of 483 documents
Numerical simulation of radiated EMI in 42V electrical automotive architectures
2006
The work is focused on the evaluation of radiated electromagnetic interference generated by dc/dc converters in 42 V systems automotive environment. The results obtained by using the method of moments and the finite difference time domain method, separately, are presented and validated in comparison with those measured in a semi-anechoic electromagnetic chamber. A measurement system set up by the authors is employed. Both the used numerical approaches are proved to be an useful tool for radiated disturbance prediction, and also for electromagnetic compatibility oriented design of the vehicle electrical architecture.
A Computational Approach to Conjugate Heat Transfer between Two Fluids in Plate Heat Exchangers of Arbitrary Geometry
2002
Conical Two-Phase Swirl Flow Atomizers—Numerical and Experimental Study
2021
This paper presents the results of numerical simulations for the developed and discussed conical two-phase atomizers with swirl flow, differing in the ratio of the height of the swirl chamber to its diameter. Experiments were carried out for SAN-1 with HS/DS = 1 and SAN-2 with HS/DS = 4 atomizers. The study was conducted over a range of Reynolds number for liquid ReL = (1400
Eulerian two-fluid model of alkaline water electrolysis for hydrogen production
2020
Hydrogen storage is a promising technology for storage of renewable energy resources. Despite its high energy density potential, the development of hydrogen storage has been impeded, mainly due to its significant cost. Although its cost is governed mainly by electrical energy expense, especially for hydrogen produced with alkaline water electrolysis, it is also driven by the value of the cell tension. The most common means of electrolyzer improvement is the use of an electrocatalyst, which reduces the energy required for electrochemical reaction to take place. Another efficient means of electrolyzer improvement is to use the Computational Fluid Dynamics (CFD)-assisted design that allows the…
On the impact of the heat transfer modelling approach on the prediction of EU-DEMO WCLL breeding blanket thermal performances
2020
Abstract The Water-Cooled Lithium-Lead Breeding Blanket is a key component of a fusion power plant, in charge of ensure Tritium production, shield Vacuum Vessel and magnets and remove the heat power deposited by radiation and particles arising from plasma. The last function is fulfilled by First Wall and Breeding Zone independent cooling systems. Several layouts of BZ coolant system have been investigated in the last years to identify a configuration that might guarantee EUROFER temperature below the limit (550 °C) and good thermal-hydraulic performances (i.e. water outlet temperature of 328 °C). A research activity is conducted to study and compare different modelling approaches to simulat…
Essays on Corruption
2021
Paper III and Paper IV is not published yet. Corruption is blamed for reductions in operational efficiency, information asymmetry, limited income distribution, policy failure, and weak economic growth and development. Corruption can originate from either the “demand-side” (the recipients of the bribe) or the “supply-side” (the givers of the bribe). This double edge effect of corruption on the economy and society makes it a multidisciplinary subject and phenomenon. Thus, scholars from different fields and disciplines, such as finance, banking, economics, accounting, law, foreign aid, and international business, examined and analyzed corruption as a multidisciplinary subject. In this disserta…
Legal Science: Functions, Significance and Futurein Legal Systems II: Collection of Research Papers in Conjunction with the 7th International Scienti…
2020
Analisi fluidodinamica e sperimentale su una turbina Cross-Flow
2014
L'energia idroelettrica è una forma di energia rinnovabile che oggi sta subendo un profondo processo di trasformazione passando da un sistema centralizzato di produzione ad un sistema di tipo distribuito. Tale processo ha dato un forte impulso alla costruzione di impianti di produzione idroelettrici su piccola scala. Questi impianti si possono realizzare: 1) lungo piccoli corsi d'acqua con piccoli salti disponibili, 2) alla fine di lunghe condotte di adduzione in corrispondenza della sezione di consegna ad un serbatoio cittadino, 3) nelle reti di distribuzione idriche dove il carico piezometrico in eccesso si dissipa con valvole di regolazione, 4) a valle di impianti di depurazione nel caso…
Conditions and strategies to meet the challenges imposed by the COVID-19-related visiting restrictions in the intensive care unit: A Scandinavian cro…
2022
ObjectivesTo examine conditions and strategies to meet the challenges imposed by the coronavirus disease 2019 (COVID-19)-related visiting restrictions in Scandinavian intensive care units.Research methodology/designA cross-sectional survey.SettingAdult intensive care units in Denmark, Norway and Sweden.Main outcome measuresLikert scale responses and free-text comments within six areas: capacity and staffing, visiting policies and access to the unit, information and conferences with relatives, written information, children as relatives and follow-up initiatives.ResultsThe overall response rate was 53% (74/140 participating units). All intensive care units had planned for capacity extensions;…
Analyse expérimentale et numérique du comportement de véhicules terrestres en présence d'un vent latéral instationnaire
2013
The automotive manufacturers are nowadays more and more interested in crosswind aerodynamics. Indeed, the driver is subjected every day to strong side air flows, for example when overtaking another vehicle or when passing through a lateral wind wall, generated by terrain topography (as in the case of the passage near the empty space between two buildings).The aerodynamic efforts generated in these situations can lead to undesired lateral deviations,which can be dramatic if the driver is surprised. Different experimental studies, reproducing the effects of a dynamic yaw angle, pointed out the issues of the steady methods, commonly used to qualify the vehicle crosswind behaviour. Little is st…