Modeling of coupled urban wind flow and indoor air flow on a high-density near-wall mesh: Sensitivity analyses and case study for single-sided ventilation.
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| Title: | Modeling of coupled urban wind flow and indoor air flow on a high-density near-wall mesh: Sensitivity analyses and case study for single-sided ventilation. |
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| Authors: | Ai, Z. T.1 zhengtao.ai@connect.polyu.hk, Mak, C. M.1 cheuk-ming.mak@polyu.edu.hk |
| Source: | Environmental Modelling & Software. Oct2014, Vol. 60, p57-68. 12p. |
| Subjects: | Winds, Ventilation, Computational fluid dynamics, Large eddy simulation models, Mathematical models |
| Abstract: | Coupled urban wind flow and indoor air flow is an important flow problem that is associated with many environmental processes. This paper provides detailed sensitivity analyses of some important computational parameters that may influence the prediction accuracy of such a flow problem. The CFD prediction of single-sided ventilation rate is taken as a case study. Based on both the RANS and LES turbulence models, the most commonly used predictive methods, namely the integration and tracer gas decay methods, are examined. A range of wind directions are considered, since the characteristics of both building aerodynamics and ventilation mechanics are distinctive under different wind directions. The performance of numerical model is thoroughly evaluated, including validation against field measurements. Specific attention is paid to sensitivity analyses of the near-wall mesh density. The implications for accurate CFD prediction of the single-sided ventilation rate are summarized, which are also applicable to other coupled flows. [ABSTRACT FROM AUTHOR] |
| Copyright of Environmental Modelling & Software is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 97297632 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Modeling of coupled urban wind flow and indoor air flow on a high-density near-wall mesh: Sensitivity analyses and case study for single-sided ventilation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ai%2C+Z%2E+T%2E%22">Ai, Z. T.</searchLink><relatesTo>1</relatesTo><i> zhengtao.ai@connect.polyu.hk</i><br /><searchLink fieldCode="AR" term="%22Mak%2C+C%2E+M%2E%22">Mak, C. M.</searchLink><relatesTo>1</relatesTo><i> cheuk-ming.mak@polyu.edu.hk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Modelling+%26+Software%22">Environmental Modelling & Software</searchLink>. Oct2014, Vol. 60, p57-68. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Winds%22">Winds</searchLink><br /><searchLink fieldCode="DE" term="%22Ventilation%22">Ventilation</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Large+eddy+simulation+models%22">Large eddy simulation models</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models%22">Mathematical models</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Coupled urban wind flow and indoor air flow is an important flow problem that is associated with many environmental processes. This paper provides detailed sensitivity analyses of some important computational parameters that may influence the prediction accuracy of such a flow problem. The CFD prediction of single-sided ventilation rate is taken as a case study. Based on both the RANS and LES turbulence models, the most commonly used predictive methods, namely the integration and tracer gas decay methods, are examined. A range of wind directions are considered, since the characteristics of both building aerodynamics and ventilation mechanics are distinctive under different wind directions. The performance of numerical model is thoroughly evaluated, including validation against field measurements. Specific attention is paid to sensitivity analyses of the near-wall mesh density. The implications for accurate CFD prediction of the single-sided ventilation rate are summarized, which are also applicable to other coupled flows. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Environmental Modelling & Software is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.envsoft.2014.06.010 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 57 Subjects: – SubjectFull: Winds Type: general – SubjectFull: Ventilation Type: general – SubjectFull: Computational fluid dynamics Type: general – SubjectFull: Large eddy simulation models Type: general – SubjectFull: Mathematical models Type: general Titles: – TitleFull: Modeling of coupled urban wind flow and indoor air flow on a high-density near-wall mesh: Sensitivity analyses and case study for single-sided ventilation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ai, Z. T. – PersonEntity: Name: NameFull: Mak, C. M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 13648152 Numbering: – Type: volume Value: 60 Titles: – TitleFull: Environmental Modelling & Software Type: main |
| ResultId | 1 |
