The development of a radon entry model for a house with a cellar

Wang, Fan; Ward, Ian

doi:10.1016/s0360-1323(99)00052-9

Cited by 29 publications

(11 citation statements)

References 7 publications

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“…In this study, a turbulent model is used, because airflow in a ventilated room even with ventilation rates below 0.2 m/s is usually in the turbulent regime, and the turbulent ke 3 model is used to solve the governing equations (Wang and Ward, 2000). The standard ke 3 model is a popular method for numerical simulation of airflow in a room.…”

Section: Numerical Simulation Approachmentioning

confidence: 99%

Influence of indoor air conditions on radon concentration in a detached house

Akbari

Mahmoudi

Ghanbari

2013

Journal of Environmental Radioactivity

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Section: Numerical Simulation Approachmentioning

confidence: 99%

Influence of indoor air conditions on radon concentration in a detached house

Akbari

Mahmoudi

Ghanbari

2013

Journal of Environmental Radioactivity

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“…On the basis of this conceptual understanding of the vapor intrusion process, several mathematical models were developed to predict radon transport through the subsurface into structures 2–6. More recently, Wang and Ward7,8 also have applied a three-dimensional (3-D) computation fluid dynamic (CFD) radon transport model.…”

Section: Introductionmentioning

confidence: 99%

“…These models were later expanded to include diffusion (as a secondary transport mechanism), multiple cracks, and some simple geological variations in close proximity to the building foundation. The most advanced 3-D CFD radon models were developed by Loureiro et al5 (modified by Revzan6) and the model later developed by Wang and Ward 7,8. These 3-D models illustrate that the quantitative prediction of transport of radon into a structure requires accounting for a multitude of effects and variables, and some considerable sophistication in the modeling geometry.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of a Three-Dimensional Finite Element Vapor Intrusion Model

Pennell

Bozkurt

Suuberg

2009

Journal of the Air & Waste Management Association

138

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Details of a three-dimensional finite element model of soil vapor intrusion, including the overall modeling process and the stepwise approach, are provided. The model is a quantitative modeling tool that can help guide vapor intrusion characterization efforts. It solves the soil gas continuity equation coupled with the chemical transport equation, allowing for both advective and diffusive transport. Three-dimensional pressure, velocity, and chemical concentration fields are produced from the model. Results from simulations involving common site features, such as impervious surfaces, porous foundation sub-base material, and adjacent structures are summarized herein. The results suggest that site-specific features are important to consider when characterizing vapor intrusion risks. More importantly, the results suggest that soil gas or subslab gas samples taken without proper regard for particular site features may not be suitable for evaluating vapor intrusion risks; rather, careful attention needs to be given to the many factors that affect chemical transport into and around buildings.

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“…Several other indoor radon models and predictions may be found in the literature, e.g. Al-Ahmady (1996), Andersen (1992Andersen ( , 1999, Fisk et al (1992), Font (1997), Font et al (1999ab), Font and Baixeras (2003), Gadgil (1992), Gunby et al (1993), Li et al (1995), Sherman (1992), Wang and Ward (2000) and With and Jong (2011). Several of the models treat selected parts of the many potential radon sources to the radon level in the indoor air environment, where some of the models may be very detailed and involve relatively complex equations covering specific parts of the total radon picture.…”

Section: Introductionmentioning

confidence: 99%

Development of a model for radon concentration in indoor air

Jelle

2012

Science of The Total Environment

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A model is developed for calculation of the radon concentration in indoor air. The model takes into account various important parameters, e.g. radon concentration in ground, radon diffusion resistance of radon barrier, air permeance of ground, air pressure difference between outdoor ground and indoor at ground level, ventilation of the building ground and number of air changes per hour due to ventilation. Characteristic case studies are depicted in selected 2D and 3D graphical plots for easy visualization and interpretation. The radon transport into buildings might be dominated by diffusion, pressure driven flow or a mixture of both depending on the actual values of the various parameters. The results of our work indicate that with realistic or typical values of the parameters, most of the transport of radon from the building ground to the indoor air is due to air leakage driven by pressure differences through the construction. By incorporation of various and realistic values in the radon model, valuable information about the miscellaneous parameters influencing the indoor radon level is gained. Hence, the presented radon model may be utilized as a simple yet versatile and powerful tool for examining which preventive or remedial measures should be carried out to achieve an indoor radon level below the reference level as set by the authorities.

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The development of a radon entry model for a house with a cellar

Cited by 29 publications

References 7 publications

Influence of indoor air conditions on radon concentration in a detached house

Influence of indoor air conditions on radon concentration in a detached house

Development and Application of a Three-Dimensional Finite Element Vapor Intrusion Model

Development of a model for radon concentration in indoor air

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