2013 Fiscal Year Final Research Report
Study on urban ventilation based on flow structure
| Project/Area Number |
23760554
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Otsuma Women's University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | CFD / 街区空間 / 風通し |
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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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