THREE-DIMENSIONAL SIMULATION OF URBAN HEAT ISLAND.

Abstract

A three-dimensional simulation for the urban heat island in Sendai with consideration of the land and sea breeze effects was performed. The governing equations were solved numerically under the assumptions of hydrostatic equilibrium, Boussinesq approximation, boundary layer approximation, and equivalent turbulent eddy diffusivity for energy and momentum, and so on. The computed results obtained from this study indicate that the urban heat island has also been formed in Sendai. The computed maximum wind velocities of the sea and land breeze were in agreement with the observed data. Further, the three-dimensional thermal structure and the flow patterns were clarified in detail.