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THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

LES analysis on heat environment in densely arrayed tall buildings
-Thermal boundary treatment in actual urban area-

pages 2439-2448
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2520
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We have conducted LES (Large Eddy Simulation), focusing on local heat environment in the urban area. For estimating the reference absolute values of wind velocity and temperature of LES, we proposed the computational model for hybrid method of LES and meso-scale meteorological model (MM5). This model was validated by comparing the results of LES with field measurement data. Also, we clarified that the heat convection as a result of mixing is active vertically and the high temperature region is recognized even at a high position in a large cavity formed behind dense tall buildings. Introducing the detailed thermal boundary treatment for temperature in actual urban surface, we examined the physical mechanism of the interaction between the heat transport stemming from the meteorological local circulation and the impact of exhaust heat from urban surfaces.

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