2012 Fiscal Year Final Research Report
High-Resolution Skin-Friction Measurement Technique Based onOptical Flow Algorithm
| Project/Area Number |
23656126
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
ASAI Keisuke 東北大学, 大学院・工学研究科, 教授 (40358669)
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| Co-Investigator(Kenkyū-buntansha) |
NUMATA Daiju 東北大学, 大学院・工学研究科, 助教 (20551534)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 流体計測 / オプチカルフロー / せん断応力 / 流れの可視化 / 画像処理 |
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| Research Abstract |
As a tool for visualizing two-dimensional skin-friction distribution on model surfaces, a new technique named “Global Luminescent Oil-Flow (GLOF)" technique has been developed. This method uses “optical flow" technique and extracts skin-friction vector field from time-series of oil-flow images. The accuracy and resolution of this technique were evaluated by applying to square cylinder and NACA-0012 airfoil testing. We found that GLOF allows us to measure skin friction distribution under the complex flow field including the reverse-flow region of a laminar separation bubble.
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