| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Research Abstract |
In this study, the influence of roof shape and building layout on flow and concentration fields were investigated by CFD simulation. Next, LES for a flowfield over an urban area was conducted to quantitatively evaluate the mean kinetic energy and turbulent kinetic energy balances and the dissipation of total kinetic energy. It was confirmed that the total energy dissipations in cases with a staggered building layout were much larger than those in cases with regular building layout, and the nonuniformity of building heights was also a significant factor that greatly increases the total energy dissipation in urban space. In addition, flow and concentration fields in a building array were predicted by CFD simulations. The prediction accuracy of the CFD simulation was assessed by comparing results with those obtained by wind tunnel experiment.
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