How wind direction and building spacing influences airflow patterns and sediment transport patterns around a row of beach buildings: A numerical study

Pourteimouri, Paran; Campmans, G.H.P.; Wijnberg, Kathelijne Mariken; Hulscher, Suzanne J.M.H.

doi:10.1016/j.aeolia.2023.100867

Cited by 15 publications

(8 citation statements)

References 38 publications

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“…Such a funnel shape could be beneficial for (fore)dune heightening. This pattern of longer side tails is confirmed by the field experiments conducted by Poppema (2022) and the CFD modelling of Pourteimouri et al (2021), illustrating that in oblique wind conditions, longer asymmetrical side tails are produced along a built object (see 3.6, principle W3). Due to the oblique wind, one side of the building will receive more sediment and be more aerodynamic and, therefore, produce a longer tail (see Figure 3.61).…”

Section: V-shape Formations As An Artificial Blowoutmentioning

confidence: 53%

“…The influence of wind-facing surface on accretionary patterns was confirmed by CFD modelling (Pourteimouri et al, 2021). Enlarging the building width increases the diversion of wind vortexes around the building, lengthening the side tails and expanding the lee area at the back of the building (Figure 3.23).…”

Section: Sedimentation Patterns Around Singular Built Objectsmentioning

confidence: 79%

“…Preliminary (qualitative) CFD modelling (Pourteimouri et al, 2021) The calculation of annual deposition showed that configuration A (top left) produces slightly more sediment accumulation at the dune top as a result of the longer tails resulting from oblique wind orientation. In yellow, the lee areas where deposition is expected.…”

Section: Extrapolation Of the Findings To The Coastal Contextmentioning

confidence: 99%

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ShoreScape

van Bergen

2023

Architecture and the Built Environment

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Urbanized sandy shores around the world suffer from coastal erosion due to a lack of sediment input and sea level rise. These dynamics place new demands on coastal spatial planning. To compensate for coastal erosion in a more natural and systemic way, sand nourishments are deployed as a ‘Building with Nature’ technique, restoring the sediment balance and promoting dune formation as coastal defence. In this research, Building with Nature is reframed as a landscape approach, regenerating the coastal landscape by tuning the interactions between the geomorphological, ecological, and urban system, to adapt to sea level rise. To this end, design principles have been developed that integrate nourishment dynamics, natural succession, and adaptive urban design to build towards safe and multi-functional coastal landscapes— Shore-Scapes. They focus on spatial coastal configurations utilizing wind-driven sedimentation processes to build up the coastal buffer, supporting dune formation, multifunctionality, and landscape differentiation. To direct sediment dynamics for coastal reinforcement and landscaping, three subsequent tools for dynamic design have been derived: morphogenesis, dynamic profiling, and aeolian design principles. With these principles, validated by fieldwork, GIS, and computational modelling, spatial arrangements can be composed enhancing the aeolian build-up of the coastal landscape over time. These principles were applied and contextualized in four case studies along the Dutch coast. They illustrate how dunes along urbanized shores can grow naturally after nourishment and allow coastal safety, recreation, and nature to complement each other.

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Section: V-shape Formations As An Artificial Blowoutmentioning

confidence: 53%

Section: Sedimentation Patterns Around Singular Built Objectsmentioning

confidence: 79%

Section: Extrapolation Of the Findings To The Coastal Contextmentioning

confidence: 99%

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ShoreScape

van Bergen

2023

Architecture and the Built Environment

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“…Another study of aeolian transport involving buildings was conducted by Pourteimouri et al [49] using the OpenFOAM model to simulate flow around a row of ten full-scale beach buildings (size of 6.00 × 2.50 × 2.50 m 3 ). Results indicate that with small gap spacings, a row of ten buildings forms a singular bluff body against wind, minimally affecting jet flows through gaps while majorly altering airflows at the upwind face and forming vortices behind.…”

Section: Numerical Modelsmentioning

confidence: 99%

Review of the Quantification of Aeolian Sediment Transport in Coastal Areas

Husemann,

Romão,

Lima

et al. 2024

JMSE

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Coastal dunes, formed and shaped by aeolian sediment transport, play a crucial role in ecosystem services and act as natural flood and coastal erosion defenses. This paper delves into theoretical equations and numerical models predicting sediment transport. Numerical models like cellular automata, XBeach-DUNA, the coastal dune model, and others are analyzed for their ability to simulate dune morphology, erosion processes, and vegetation impacts accurately. Evaluated are field observation and measurement techniques, such as sand traps, impact sensors, and optical sensors, for their precision in quantifying aeolian dynamics. Further examined is the effectiveness of vegetation and fencing in dune stabilization, noting species-specific responses and the influence of fence design on sediment accumulation. These tools offer insights into optimizing aeolian sediment management for coastal protection. By conducting a systematic review and connecting theoretical, empirical, and modeling findings, this study highlights the complex challenge of measuring and managing aeolian sediment transport and proposes integrated strategies for enhancing coastal dune resilience against the backdrop of climate change and erosion. This study’s objectives to bridge gaps in current understanding are met, highlighting the need for a multidisciplinary approach to coastal dune management and conservation, especially combining wind- and wave-driven processes.

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“…Building clusters are the primary factor affecting wind fields in urban areas. The geometric shape, layout, height, and orientation of buildings influence the wind flow field [17][18][19]. However, it is difficult and time-consuming to consider the detailed characteristics of individual buildings to describe the wind field of the urban environment accurately.…”

Section: Introductionmentioning

confidence: 99%

A Generalization of Building Clusters in an Urban Wind Field Simulated by CFD

Qiu,

He,

et al. 2023

Atmosphere

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The urban climate has a critical influence on developing sustainable cities, and one important factor is the urban wind environment. Moreover, refining urban wind fields is required for the quantitative assessment of urban wind environments. Computational fluid dynamics (CFD) is a powerful tool for modeling the wind flow characteristics in urban areas. Although CFD has been widely used in various fields, its use for simulating urban wind fields has limitations because of the complexity of urban building models and the high computational workload. Accordingly, we consider the generalization parameters in the vertical and horizontal directions based on the CFD results and the building topology based on the state of the building nodes. We perform a two-dimensional generalization of building clusters, conduct spatial analysis in a geographic information system (GIS), and generate three-dimensional models. This generalization scheme is applied to Meiling Street in Jinjiang City, Fujian Province, China. The results indicate that the generalization decreases the number of buildings from 7003 to 3367 and the computation time from 11 h and 26 min to 10 h and 25 min. The computation efficiency is improved by 8.89%, with 1.85% changes in the average wind speed ratio. This scheme substantially improves the computational efficiency of urban wind field CFD simulations by reducing the geometric model’s complexity without compromising the accuracy. This strategy is suitable for simulating large-scale urban wind fields.

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How wind direction and building spacing influences airflow patterns and sediment transport patterns around a row of beach buildings: A numerical study

Cited by 15 publications

References 38 publications

ShoreScape

ShoreScape

Review of the Quantification of Aeolian Sediment Transport in Coastal Areas

A Generalization of Building Clusters in an Urban Wind Field Simulated by CFD

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