Steady-flow experiments in urban areas and anisotropic porosity model

Velickovic, Mirjana; Zech, Yves; Frazao, Sandra Soares

doi:10.1080/00221686.2016.1238013

Cited by 43 publications

(85 citation statements)

References 18 publications

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“…This model yields a zero drag force for θ = 0 and θ = π 2 , while θ = ± π 4 yields a maximum drag, as expected from [38]. The proposed model can be viewed as a limit case of Velickovic et al's model as a tends to innity in equation (11).…”

Section: Source Term Modelsmentioning

confidence: 99%

“…Section 4 is devoted to the analysis of the ux closure formulae in the SP, IP and DIP models. Section 5 deals with the assessment of the source term models, including the transient momentum dissipation model [14] and the generalised tensor model [38]. Section 6 is devoted to a summary of results and a discussion.…”

Section: Q4mentioning

confidence: 99%

“…, where it is known from experiments to be maximum [38] To overcome this problem, it is proposed that the formula (11) be revised as follows…”

Section: Source Term Modelsmentioning

confidence: 99%

“…A number of numerical solution techniques have been developed for the depthindependent SP equations [2,4,8,15,26]. Recently, a generalized source term has been proposed for the specic purposes of urban ood modelling [38].…”

Section: Introductionmentioning

confidence: 99%

“…The porosity reects the fraction of the plan view area available to mass and momentum storage. For shallow ows over natural topographies, the porosity is depth-dependent [1,5,6,39], while urban ood applications consider a depth-independent porosity [15,16,37,38]. A number of numerical solution techniques have been developed for the depthindependent SP equations [2,4,8,15,26].…”

Section: Introductionmentioning

confidence: 99%

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A critical assessment of flux and source term closures in shallow water models with porosity for urban flood simulations

Guinot

2017

Advances in Water Resources

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To cite this version:Vincent Guinot. A critical assessment of flux and source term closures in shallow water models with porosity for urban flood simulations. Advances in Water Resources, Elsevier, 2017, 109, pp.133-157 AbstractThe validity of ux and source term formulae used in shallow water models with porosity for urban ood simulations is assessed by solving the two-dimensional shallow water equations over computational domains representing periodic building layouts. The models under assessment are the Single Porosity (SP), the Integral Porosity (IP) and the Dual Integral Porosity (DIP) models. 9 dierent geometries are considered. 18 two-dimensional initial value problems and 6 two-dimensional boundary value problems are dened. This results in a set of 96 ne grid simulations. Analysing the simulation results leads to the following conclusions: (i) the DIP ux and source term models outperform those of the SP and IP models when the Riemann problem is aligned with the main street directions, (ii) all models give erroneous ux closures when is the Riemann problem is not aligned with one of the main street directions or when the main street directions are not orthogonal, (iii) the solution of the Riemann problem is self-similar in space-time when the street directions are orthogonal and the Riemann problem is aligned with one of them, (iv) a momentum balance conrms the existence of the transient momentum dissipation model presented in the DIP model, (v) none of the source term models presented so far in the literature allows all ow congurations to be accounted for(vi) future laboratory experiments aiming at the validation of ux and source term closures should focus on the high-resolution, two-dimensional monitoring of both water depth and ow velocity elds.

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Section: Source Term Modelsmentioning

confidence: 99%

Section: Q4mentioning

confidence: 99%

“…, where it is known from experiments to be maximum [38] To overcome this problem, it is proposed that the formula (11) be revised as follows…”

Section: Source Term Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A critical assessment of flux and source term closures in shallow water models with porosity for urban flood simulations

Guinot

2017

Advances in Water Resources

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Leaving or Sheltering? a Simulation-Based Comparison of Flood Evacuation Strategies in Urban Built Environments

Quagliarini

Romano

Bernardini

et al. 2021

Sustainability in Energy and Buildings 2021

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Investigation of the Hydraulics in Flooded Housing Estate

Doumic

Larrarte

Rtimi³

et al. 2022

Advances in Hydroinformatics

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Climate change is currently taking place at the scale of our planet, leading to aviolent response from the environment, particularly with regard to the water cycle. One of the risk is already floods. As an example, in France, the average annual costof damages caused by floods (and insured under the Natural Disaster plan) amountsto 520 million euros. In metropolitan France, nearly 17 million people, about aquarter of the national population, are exposed to the risk of flooding by overflowaccording to the preliminary flood risk assessment carried out by the State in 2011.And with climate evolution, floods will become more frequent and more intense. Onechallenge during floods is to be able to access to people refugee over buildings.In order to investigate the hydraulic context generated by the grouped obstaclesrepresentative of a submerged housing estate, both an experimental and numericalstudy is being conducted.We experimentally study the flow in the presence of rows of macro-roughnessesrepresentative of a slightly emerged and of a submerged housing estate, and this forsituations representing both current and more intense floods. Measurements of the velocity field will provide information on currents distribution that might affect an evacuation process. In parallel a numerical study is also conducted with the opensource code Saturne. The nuemerical results are compared to experimental results and this preliminary stupy opens the way to a systematic investigation.

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Steady-flow experiments in urban areas and anisotropic porosity model

Cited by 43 publications

References 18 publications

A critical assessment of flux and source term closures in shallow water models with porosity for urban flood simulations

A critical assessment of flux and source term closures in shallow water models with porosity for urban flood simulations

Leaving or Sheltering? a Simulation-Based Comparison of Flood Evacuation Strategies in Urban Built Environments

Investigation of the Hydraulics in Flooded Housing Estate

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