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Vapor intrusion in buildings: Development of semi-empirical models including lateral separation between the building and the pollution source

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Building Simulation 2022年第12期15卷 2031-2049页

作者： Juan Sebastian Rios Mora Thierno Diallo Bernard Collignan Marc Abadie Karim Limam Centre Scientifique et Technique du Batiment Health and Comfort DepartmentSaint-Martin-d'HèresCO 38400France University of La Rochelle Laboratoire des Sciences de I'Ingénieur pour I'Environnement-LaSIE UMR CNRS 7356La RochelleCO 17042France

Future constructions in the context of the industrial wastelands reuse may be exposed to Vapor Intrusion(VI).VI can be evaluated by combining in-situ measures and analytical models to evaluate exposure risk in future indoor ***,the assumptions in the existing models may reduce their accuracy when they do not meet the characteristics of real *** estimations of indoor concentration levels may lead to inappropriate solutions against *** this context,new semi-empirical models(SEM)are proposed in order to better specify pollution scenarios and thus increase the accuracy of VI *** development is based on a parametric study(numerical CFD)and a dimensionless analysis combined to existing VI models that consider a continuous source distribution in the *** expressions allow to better take into account the source position in the soil(*** and lateral source/building separation),soil properties(air permeability,diffusion coefficient of the pollutant,…)and building features(building foundation,indoor pressure,air exchange rate,…)in the estimation of indoor concentration *** obtained results with the proposed SEM were compared with a numerical CFD model and available experimental data,showing good accuracy in the estimation of *** the advantages of these new models,they can provide better precision in the health risk assessments associated with ***,these expressions can be easily integrated into building ventilation codes allowing to consider air exchange rate and indoor pressure variations over time.

关键词： indoor air quality lateral source/building distance polluted soils semi-empirical models vapor intrusion

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Non-isothermal Dissolution Modelling of Sigma Phase in Duplex Stainless Steels

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 859-868页

作者： Paolo Ferro Alberto Fabrizi Franco Bonollo Department of Management and Engineering University of PadovaStradella San Nicola 336100 VicenzaItaly

In this work, the non-isothermal dissolution kinetics of the sigma phase in duplex stainless steels has been studied and modelled. A semi-empirical model is proposed to describe the kinetics of sigma phase precipitation/dissolution during continuous heating starting from the isothermal transformation kinetics. The proposed model, which presumes validity of the additivity rule, is validated by means of experimental investigations. A good agreement is found between experimental and analytical results.

关键词： Kinetics Non-isothermal dissolution Modelling semi-empirical models Sigma phase Duplex stainless steels

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