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| Author | Ysebaert, T.; Samson, R.; Denys, S. | ||||
| Title | Parameterisation of the drag effect of climbers depending on wind speed and LAD | Type | A1 Journal article | ||
| Year | 2022 | Publication | Sustainable Cities and Society | Abbreviated Journal | Sustain Cities Soc |
| Volume | 84 | Issue | Pages | 103979-12 | |
| Keywords | A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) | ||||
Abstract  |
The implementation of green walls is increasingly seen as a strategy to tackle urban air pollution and to make cities more climate resilient. The correct description of the vegetation-wind interaction is key in describing the effect of vegetation in computational fluid dynamics (CFD) models. The accuracy of the modelled wind flow is highly linked to the uncertainty about the drag coefficient (C-d). In addition, at low wind speeds viscous drag (K) is not negligible and it should be regarded in CFD models. This research aims to address the uncertainty related to C-d and K by including the effect of climbers on both the momentum and turbulence equations in the Wilcox revised k-omega model. The change of K with increasing Reynolds number showed an increase from 5.10(-8 )m(2) up to the dynamic viscosity of air (asymptotic to 10(-5) m(2)) following a logistic function. Beyond the transition region from viscous to form drag, C-d, in the range of 0.1-1.1, declined with increasing Reynolds number following a power law function. Furthermore, the plant morphological parameters determining permeability and drag coefficient were identified. This study showed that the knowledge of viscous and shape resistance is necessary to obtain accurate statistics for air flow through vegetation. | ||||
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| Publisher | Place of Publication | Editor | |||
| Language | Wos | 000831685500001 | Publication Date | 2022-06-14 | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 2210-6707 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
| Impact Factor | 11.7 | Times cited | Open Access | OpenAccess | |
| Notes | Approved | Most recent IF: 11.7 | |||
| Call Number | UA @ admin @ c:irua:189465 | Serial | 7187 | ||
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