An application of the thermo-radiative model SOLENE for the evaluation of street canyon energy balance

Idczak, M.; Groleau, Dominique; Mestayer, P.G.; Rosant, J.-M.; Sini, J.-F.

doi:10.1016/j.buildenv.2009.11.011

Cited by 34 publications

(37 citation statements)

References 30 publications

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Section: Model Validationmentioning

confidence: 99%

“…In the current study, the numerical model was validated against a field measurement [41] for surface heating comparison and a wind tunnel experiment [51] for air flow velocity comparison, separately. Figure 4 compares the numerical prediction of surface temperature with a field measurement conducted by Idczak et al [41]. It should be noted that this field measurement records thermal environment data including solar radiation, surface and air temperature based on a street canyon with the aspect ratio of 2.48, and the street direction was kept E-W, which is different from the benchmark model used in this study.…”

Section: Model Validationmentioning

confidence: 99%

“…It should be noted that this field measurement records thermal environment data including solar radiation, surface and air temperature based on a street canyon with the aspect ratio of 2.48, and the street direction was kept E-W, which is different from the benchmark model used in this study. Thus, an extra street canyon model was built for numerical validation purpose, which applied identical meteorology and geometry conditions with Idczak et al's [41] measurement. RNG k-epsilon turbulence model with scalable wall function was adopted to solve the governing equations.…”

Section: Model Validationmentioning

confidence: 99%

“…z is the aerodynamic roughness length, set as 0.03 m,  is von Karman's constant, set as 0. 41,10 U is the reference horizontal velocity at 10 m high, set as 1 m/s [36]. Symmetry boundary condition was imposed at two side planes, while all other solid facets were set as no slip boundaries.…”

Section: Introductionmentioning

confidence: 99%

“…The transmissivity of the inlet, outlet and the top boundary was set as 1.0, and the effective sky temperature was used as external radiation condition [40]. The physical properties of all facets were referred from Idczak's study [41], and model details are listed in Table 1. Tracing particles representing vehicular emissions were released from a line source located along the center-line of the street for the street canyon ventilation assessment purpose [42,43].…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Changing Effect on Airflow and Pollutant Dispersion Characteristics in Urban Street Canyons

et al. 2017

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Abstract:In this study, the effect of seasonal variation on air flow and pollutant dispersion characteristics was numerically investigated. A three-dimensional urban canopy model with unit aspect ratio (H/D = 1) was used to calculate surface temperature distribution in the street canyon. Four representative time events (1000 LST, 1300 LST, 1600 LST and 2000 LST) during typical clear summer and winter days were selected to examine the air flow diurnal variation. The results revealed the seasonal variation significantly altered the street canyon microclimate. Compared with the street canyon surface temperature distribution in summer, the winter case showed a more evenly distributed surface temperature. In addition, the summer case showed greater daily temperature fluctuation than that of the winter case. Consequently, distinct pollutant dispersion patterns were observed between summer and winter scenarios, especially for the afternoon (1600 LST) and night (2000 LST) events. Among all studied time events, the pollutant removal performance of the morning (1000 LST) and the night (2000 LST) events were more sensitive to the seasonal variation. Lastly, limited natural ventilation performance was found during the summer morning and the winter night, which induced relatively high pollutant concentration along the pedestrian height level.

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Section: Model Validationmentioning

confidence: 99%