CFD SIMULATIONS ON DISPERSION OF HIGH-TEMPERATURE EXHAUST GAS AROUND AN ISOLATED BUILIDING MODEL
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- LIN Chao
- Graduate School of Engineering, The University of Tokyo
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- OOKA Ryozo
- Institute of Industrial Science, The University of Tokyo
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- KIKUMOTO Hideki
- Institute of Industrial Science, The University of Tokyo
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- SATO Taiki
- Taisei Corporation Technology Center
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- ARAI Maiko
- Taisei Corporation Technology Center
Bibliographic Information
- Other Title
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- 単体建物周辺における高温排気ガスの拡散を対象としたCFD解析
- CFD SIMULATIONS ON DISPERSION OF HIGH-TEMPERATURE EXHAUST GAS AROUND AN ISOLATED BUILDING MODEL
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Abstract
<p>As the use of emergency generators for buildings increases, the near-field dispersion of high-temperature and highbuoyancy exhaust gas is becoming a concern. We conducted computational fluid dynamics (CFD) simulations using steady Reynolds-averaged Navier-Stokes (RANS) model and large eddy simulation (LES) on the near-field dispersion of high-buoyancy exhaust gas emitted from a building’s wake and validated using a wind tunnel experiment. Realizable k-ε 2-layer and wall-adapting local eddy viscosity (WALE) models were used in RANS and LES, respectively. The density difference between the light gas and ambient air in the experiment was reproduced as the temperature difference by an incompressible ideal gas model. RANS model exhibited good agreement with the experimental flow field values for the time-averaged velocity but underestimated the turbulent kinetic energy. LES accurately predicted both the timeaveraged velocity and turbulent kinetic energy. For the concentration field, RANS model predicted the region of high time-averaged concentration near the exhaust port but overestimated ground-level values. Meanwhile, LES adequately predicted time-averaged and fluctuating concentrations.</p>
Journal
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- SEISAN KENKYU
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SEISAN KENKYU 73 (1), 37-46, 2021-01-01
Institute of Industrial Science The University of Tokyo
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Details 詳細情報について
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- CRID
- 1390568617216683520
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- NII Article ID
- 130007986051
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- NII Book ID
- AN00127075
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- ISSN
- 18812058
- 0037105X
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- NDL BIB ID
- 031269405
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed