On CFD simulation of wind-induced airflow in narrow ventilated facade cavities: Coupled and decoupled simulations and modelling limitations

Nore, Kristine; Blocken, Bje Bert; Thue, Jan Vincent

doi:10.1016/j.buildenv.2010.02.014

Cited by 43 publications

(19 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These numerical models allow selecting specific meteorological conditions to verify the air flow pattern behind cladding systems. For example, while Labat et al [15] focuses on solar driven air flow behind open joint claddings, Nore et al [13] studied the impact of wind-driven cavity ventilation behind sidings. A second group consists of methods in which the cavity flow conditions are modelled by hydraulic networks [e.g.…”

Section: Introductionmentioning

confidence: 99%

“…A) Comparison of the calculated ventilation rates based on Eq (13). and based on the indirect method for the first week of February 2014 B) comparison between measured vapour pressure in the air cavity (red), outside vapour pressure (green), simulated vapour pressure based with measured ventilation rate (blue) and constant ventilation rates (grey) (10-min data).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Experimental analysis of cavity ventilation behind rainscreen cladding systems: A comparison of four measuring techniques

Langmans

Roels

2015

Building and Environment

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Experimental analysis of cavity ventilation behind rainscreen cladding systems: A comparison of four measuring techniques

Langmans

Roels

2015

Building and Environment

View full text Add to dashboard Cite

“…The coupled approach is difficult to employ when the differences in length scale are substantial or when flow behavior problems exist (Nore et al 2010). The decoupled approach is simplified compared to the coupled approach, but it is only efficient for certain phenomena.…”

Section: Decoupled Outdoor Wind and Indoor Infiltrationmentioning

confidence: 99%

Air infiltration induced inter-unit dispersion and infectious risk assessment in a high-rise residential building

Niu

2017

Build. Simul.

View full text Add to dashboard Cite

Identifying possible airborne transmission routes and assessing the associated infectious risks are essential for implementing effective control measures. This study focuses on the infiltration-induced inter-unit pollutant dispersion in a high-rise residential (HRR) building. The outdoor wind pressure distribution on the building facades was obtained from the wind tunnel experiments. And the inter-household infiltration and tracer gas transmission were simulated using multi-zone model. The risk levels along building height and under different wind directions were examined, and influence of component leakage area was analysed. It is found that, the cross-infection risk can be over 20% because of the low air infiltration rate below 0.7 ACH, which is significantly higher than the risk of 9% obtained in our previous on-site measurement with air change rate over 3 ACH. As the air infiltration rate increases along building height, cross-infection risk is generally higher on the lower floors. The effect of wind direction on inter-unit dispersion level is significant, and the presence of a contaminant source in the windward side results in the highest cross-infection risks in other adjacent units on the same floor. Properly improving internal components tightness and increasing air change via external components are beneficial to the control of internal inter-unit transmission induced by infiltration. However, this approach may increase the cross-infection via the external transmission, and effective control measures should be further explored considering multiple transmission routes.

show abstract

“…On the other hand, CFD calculations provide data about complete flow area, i.e. the significant parameters in entire computational domain [3,[14][15][16][17][18]. An important advantage of numerical calculations is that it can be carried at the real scale (opposite are wind-tunnel experiments).…”

Section: Introductionmentioning

confidence: 99%

Wind-induced pressure loads on buildings in tandem arrangement in urban environment

Gnatowska

2018

Environ Fluid Mech

View full text Add to dashboard Cite

The wind-induced pressure loads are affected by a broad spectrum of elements involving flow conditions, buildings geometry, or neighbourhoods. Computational fluid dynamics is a useful device used to estimate pressure distribution. The aim of this research is a detailed assessment of the use of numerical calculation (RANS) for forecasting wind-induced pressure loads on buildings arranged in tandem located in the built-up area. The approach of this work was to determine the pressure loads on the walls of rectangular objects, which were the simplified models of buildings located in the ground-level zone. The important task was to estimate the impact of distance between obstacles on the pressure loads on their surfaces. It was found that when changing the distance between buildings the pressure distribution on the downstream object varies significantly. Additionally, for defined geometrical parameters, the influence of inflow angle was analysed. The obtained results demonstrate and confirm that RANS numerical calculations, in spite of all their limits, can accurately modeling the pressure distribution on buildings.

show abstract

On CFD simulation of wind-induced airflow in narrow ventilated facade cavities: Coupled and decoupled simulations and modelling limitations

Cited by 43 publications

References 23 publications

Experimental analysis of cavity ventilation behind rainscreen cladding systems: A comparison of four measuring techniques

Experimental analysis of cavity ventilation behind rainscreen cladding systems: A comparison of four measuring techniques

Air infiltration induced inter-unit dispersion and infectious risk assessment in a high-rise residential building

Wind-induced pressure loads on buildings in tandem arrangement in urban environment

Contact Info

Product

Resources

About