Influence of oxy-firing on radiation transfer to the glass melt in an industrial furnace: Importance of spectral radiation model

Coupled reactive fluid dynamics and radiation calculations are performed in air and oxy-fuel-fired industrial glass furnaces using two gas radiative property models. The first one is the weighted sum of gray gases model and the second one is the correlated-/c method, which is a spectral model based on the cumulative distribution function of the absorption coefficient inside a narrow band. The first model, generally used in glass furnaces, is less time-consuming than the second one. However, discrepancies up to several tens of percent are found in the local heat flux on the glass surface between the two radiative models, especially in air combustion

La Missione Archeologica Tuniso-Italiana a Numluli: l’attività di ricerca del 2022

The first excavation campaign of the Tunisian-Italian INP-Uniss Archaeological Mission in Numluli has just ended and we already want to illustrate preliminarily here the research activity carried out last September in the site of the municipium. The excavation areas opened in the forum in front of the Capitolium and in an early Christian basilica on the western edge of the settlement have given remarkable results of which we are proposing here a first synthetic examination, together with the study of the inscriptions of the Roman town which is the other important line of the research.Si è da poco conclusa la prima campagna di scavo della Missione Archeologica Tuniso-Italiana INP-Uniss a Numluli e si vuole già illustrare qui preliminarmente l’attività di ricerca svolta nello scorso mese di settembre nel sito del municipium. Le aree di scavo aperte nella piazza del foro di fronte al Capitolium e in una basilica paleocristiana ai margini occidentali dell’abitato hanno dato notevoli risultati dei quali viene qui proposto un primo sintetico esame, insieme allo studio delle iscrizioni della città romana che costituisce l’altro importante filone della ricerca

Development of a physically-based planar inductors VHDL-AMS model for integrated power converter design

Design of integrated power converters needs prototype-less approaches. Specific simulations are required for investigation and validation process. Simulation relies on active and passive device models. Models of planar devices, for instance, are still not available in power simulator tools. There is, thus, a specific limitation during the simulation process of integrated power systems. The paper focuses on the development of a physically-based planar inductor model and its validation inside a power converter during transient switching. The planar inductor model remains a complex device to model, particularly when the skin, the proximity and the parasitic capacitances effects are taken into account. Heterogeneous simulation scheme, including circuit and device models, is successfully implemented in VHDL-AMS language and simulated in Simplorer platform. The mixed simulation results has been favorably tested and compared with practical measurements. It is found that the multi-domain simulation results and measurements data are in close agreement