The COST 732 Best Practice Guideline for CFD simulation of flows in the urban environment: a summary

Joerg, Franke; Hellsten, Antti; Schlünzen, K. Heinke; Carissimo, Bertrand

doi:10.1504/ijep.2011.038443

Cited by 818 publications

(899 citation statements)

References 4 publications

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“…It is therefore necessary to include the equations which allow to calculate those additional unknowns. All turbulence models containing the above mentioned standard k-ε and k-ε realizable deal with this problem [12,23].…”

Section: Numerical Modelmentioning

confidence: 99%

“…Research methods of numerical simulation allow to analyze many variants of building shape and position in short periods of time. Although some recommendations and practice guidelines for such studies are available in literature [11,12], they require high expertise and a creative approach to each facility and pose a scientific challenge [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of numerical and experimental studies of the airflow around the sample of urban development

Gumowski

Olszewski

Poćwierz

et al. 2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. In this paper, on the background of a short overview of the recent advances in the field of Environmental Wind Engineering (EWE), a comparison of wind tunnel experiment and numerical simulation for some cases of airflow around an urban layout have been reported. The purpose of the study is quantitative and qualitative comparison of measurements in the wind tunnel as well as numerical simulation using Ansys Fluent software. The study is concerned mostly with the analysis of parameters which are essential in the building industry, such as pressure and velocity fields. In the numerical analysis the k-ε realizable model of turbulence with the basic model of boundary layer -Standard Wall Treatment, were used. Particular attention has been paid to accurate depiction of the conditions on the inlet and the selection of suitable computing.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative analysis of numerical and experimental studies of the airflow around the sample of urban development

Gumowski

Olszewski

Poćwierz

et al. 2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…A lower resolution is employed for the surrounding buildings. The surrounding buildings of the CREATE Tower have been modelled following best practice guidelines [23]. If the distance from a building of height H to the CREATE Tower is lower than 6H , the building is explicitly modelled.…”

Section: 3) Wind Predictions At Unmeasured Locationsmentioning

confidence: 99%

“…If the distance from a building of height H to the CREATE Tower is lower than 6H , the building is explicitly modelled. The size of the computational domain has also been determined using best practice guidelines [23], creating a computational domain with dimensions 2233 1144 368…”

Section: 3) Wind Predictions At Unmeasured Locationsmentioning

confidence: 99%

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A model-based data-interpretation framework for improving wind predictions around buildings

Vernay

Raphael

Smith

2015

Journal of Wind Engineering and Industrial Aerodynamics

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Abstract:Although Computational Fluid Dynamics (CFD) simulations are often used to assess wind conditions around buildings, the accuracy of such simulations is often unknown. This paper proposes a datainterpretation framework that uses multiple simulations in combination with measurement data to improve the accuracy of wind predictions. Multiple simulations are generated through varying sets of parameter values. Sets of parameter values are falsified and thus not used for predictions if differences between measurement data and simulation predictions, for any measurement location, are larger than an estimate of uncertainty bounds. The bounds are defined by combining measurement and modelling uncertainties at sensor locations. The framework accounts for time-dependent and spatially-distributed modelling uncertainties that are present in CFD simulations of wind. The framework is applied to the case study of the CREATE Tower located at the National University of Singapore. Values for timedependent inlet conditions, as well as values for the roughness of surrounding buildings, are identified with measurements carried out around the CREATE Tower. Results show that, on average, ranges of

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Application of uncertainty quantification techniques in the framework of process safety studies: Advanced dispersion simulations

Bellegoni,

Marroni,

Mariotti

et al. 2024

Can J Chem Eng

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In the framework of process safety studies, consequence assessment of accidental scenarios is a crucial step affecting the eventual risk profile associated with the facilities under analysis. Conventional models used for consequence assessment are based on integral models, and may not be adequate to cope with the dynamic evolution of accidental scenarios and their three‐dimensional features. On the other hand, consequence assessment models based on computational fluid dynamics (CFD) approaches are promising to cope with complex scenarios and environments, but setting the simulation introduces relevant uncertainties associated with both the input data, assumptions, and with the modelling of physical effects involved. In the present study, uncertainty quantification (UQ) techniques are applied to support advanced safety studies based on CFD simulations of hazardous gas dispersion. Firstly, the accidental scenarios are characterized by defining release scenarios and conditions and quantifying source terms using integral models. At the same time, input meteorological data are gathered. This enables the development of high‐fidelity CFD simulations of gas dispersion based on different input sets and eventually the implementation of UQ techniques. The generalized polynomial chaos (gPC) expansion is employed to obtain hazardous gas concentration based on the variation of wind direction and speed. The present method is applied for the analysis of a real plant featuring a complex layout. The results show the advantages of the present approach by quantifying the influence of meteorological conditions and providing indications for supporting the development of protection systems and emergency measures.

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The COST 732 Best Practice Guideline for CFD simulation of flows in the urban environment: a summary

Cited by 818 publications

References 4 publications

Comparative analysis of numerical and experimental studies of the airflow around the sample of urban development

Comparative analysis of numerical and experimental studies of the airflow around the sample of urban development

A model-based data-interpretation framework for improving wind predictions around buildings

Application of uncertainty quantification techniques in the framework of process safety studies: Advanced dispersion simulations

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