the natural ventilation is an easy way to exchange the indoor polluted warm air with outdoor fresh air. the wind power injects outdoor fresh air into the building. a good indoor air current and subsequently a proper exhaust depend on the openings’ conditions and their situations. a serious architectural question is under what conditions of the openings the wind-cross ventilation can be effectiv...

Designing for wind driven cross ventilation is challenging due to the dynamic characteristics of wind. While numerous studies have used wind tunnels and computational fluid dynamics to study cross ventilation, few have utilized a full scale experimental approach. Thus, this paper provides measurements of wind properties, façade pressures, airflow rates through small window openings, and tracer ...

As most existing office buildings in China lack fresh air systems for ventilation, natural ventilation with windows remains the main means of improving indoor quality and adjusting thermal comfort. However, knowledge characteristics various window-opening forms actual is limited current methods evaluating performance a comprehensive consideration rate In this study, different were systematicall...

Natural ventilation can contribute to a sustainable and healthy built environment, but the flow be highly dependent on configuration outdoor turbulent wind conditions. As result, quantifying natural rates challenging task. Wind tunnel experiments offer one approach for studying ventilation, measurements are often restricted few points or planes in building, data have limitations due intrusive n...

Natural ventilation is gaining popularity in response to an increasing demand for a sustainable and healthy built environment, but the design of naturally ventilated building can be challenging due inherent variability operating conditions that determine natural flow. Large-eddy simulations (LES) have significant potential as analysis method flow, since they provide accurate prediction turbulen...

OBJECTIVE Tuberculosis transmission in healthcare facilities contributes significantly to the TB epidemic, particularly in high HIV settings. Although improving ventilation may reduce transmission, there is a lack of evidence to support low-cost practical interventions. We assessed the efficacy of wind-driven roof turbines to achieve recommended ventilation rates, compared to current recommende...

A large eddy simulation (LES) program with the Smagorinsky subgrid-scale model has been used to study cross natural ventilation in buildings, which has experimental data available from on-site measurements and a wind tunnel. Since natural wind changes direction over time, it is hard to reproduce this effect in a conventional wind tunnel where the “wind” direction is fixed. There are discrepanci...

Natural ventilation of buildings is the flow generated by temperature differences and by the wind. The governing feature of this flow is the exchange between an interior space and the external ambient. Although the wind may often appear to be the dominant driving mechanism, in many circumstances temperature variations play a controlling feature on the ventilation since the directional buoyancy ...