2015 Fiscal Year Final Research Report
Visualization measurements of turbulence spatial structures in the stable surface boundary layers
Project/Area Number |
26550002
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Environmental dynamic analysis
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Research Institution | Hokkaido University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
SHIMOYAMA Kou 北海道大学, 低温科学研究所, 助教 (50391115)
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Project Period (FY) |
2014-04-01 – 2016-03-31
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Keywords | PIV / 乱流 / 接地境界層 / 空間構造 / その場観測 / 流れの可視化 |
Outline of Final Research Achievements |
This study aimed at developing a new technique for in-situ measurements of turbulence spatial structures in the stable boundary layers. A PIV method was introduced to measure turbulence velocities in outdoor conditions. Main achievements include the following. (1) A specially designed seeding device was developed to supply tracer particles into a large area of measurements in the field. (2) A parallelized computer software was compiled to efficiently calculate velocities through perspective transformation and cross-correlations of images taken at an oblique angle. (3) Field tests confirmed that the developed PIV system was able to measure turbulence velocities as accurate as sonic anemometers.
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Free Research Field |
境界層気象学
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