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Effects of Concrete Pavement on Atmospheric Thermal Environment Adjacent to Ground under Solar Radiation

A numerical simulation has been conducted for concrete pavement on atmospheric thermal environment adjacent to ground under solar radiation. By computational fluent dynamics software Fluent, the finite volume method was used, and the solar radiation was described by the non-gray radiation transfer model and was solved by the Discrete Ordinate Method (DOM). The concept of constant temperature layer was introduced in order to determine the real temperature on pavement. Computed results indicate that the temperature on concrete pavement is impacted by the solar radiation significantly, and the atmospheric temperature falls down in geometric series with the increasing distance to ground. However, the effects of pavement on the temperature of ambient air beyond the near-ground region become much gentle. In comparison to the measured values, it shows that the current numerical method can simulate the interaction between pavement and ambient atmosphere effectively and can be extended to urban microclimate simulation.