Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


A Wind Tunnel Study on Effect of Scalar Transport between Urban-like Block Array and Air

Juyeon Chung, Aya Hagishima, Naoki Ikegaya, Jun Tanimoto

Abstract: For accurate prediction of urban climate, it is essential to accurately estimate the convection heat and evaporation heat on urban surfaces. This paper presents the result of a wind-tunnel experiment of the scalar transfer coefficients of streets of urban-like block arrays under the several conditions of scalar source size based on the salinity method. In addition, evaporation from flat wet surfaces partitioned by dry patches is measured in order to clarify the oasis effect. The results suggest the partitioning effect of dry patches enhances scalar transfer efficiency as compared to the turbulent mixing effect of the urban roughness. Additionally, similar depth of the boundary layer of both scalar and momentum was observed for not only smooth wet surface but also a block array.
Keywords: Scalar transfer coefficient, Scalar source size, Wind-tunnel experiment
Pages: 769 - 777