Abstract
The present paper presents a detailed computational analysis of flow and dispersion in a generic isolated single–zone buildings. First, a grid generation strategy is discussed, that is inspired by a previous computational analysis and a grid independence study. Different turbulence models are appliedincluding two-equation turbulence models, the differential Reynolds Stress Model, Detached Eddy Simulation and Zonal Large Eddy Simulation. The mean velocity and concentration fields are calculated and compared with the measurements. A satisfactory agreement with the experiments is not observed by any of the modelling approaches, indicating the highly demanding flow and turbulence structure of the problem.
Highlights
Natural convection is an important feature in the development of energy-efficient and healthy indoor environment [1]
Due to the rather inferior performance or the RANSRSM, they are not included in the further comparisons
The Reynolds Averaged Numerical Simulations (RANS) predictions by the turbulence viscosity models are compared with experiments in Figure 6, where profiles of the normalized axial velocity along a vertical line emerging from the middle point of the jet inlet are shown
Summary
Natural convection is an important feature in the development of energy-efficient and healthy indoor environment [1]. Tominaga and Blocken [14] performed detailed measurements of flow and dispersion on cross-ventilated buildings in an atmospheric boundary layer wind tunnel, as a continuation of their previous paper [15], emphasizing the importance of these detailed measurements for a better understanding of the dispersion process and as data for CFD validation studies. The latter is the scope of the present study. The measurements [14] are taken as the data base to validate the CFD analyses, in particular, with respect to the applied turbulence modelling
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