2010 Fiscal Year Final Research Report
Examination based on computational electromagnetics about the effect of particle deformation to non-spherical shape on the optical particle measurements
| Project/Area Number |
20560190
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
OKAMOTO Tatsuyuki Kyoto Institute of Technology, 工芸科学研究科, 教授 (40127204)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 熱工学 / 計測工学 / 光学粒子計測 / 非球形粒子 / 計算電磁気学 |
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| Research Abstract |
Examination about the effect of particle deformation from a true sphere to an ellipsoid on the optical particle measurement technique was carried out based on the method of computational electromagnetics. In case of the phase-Doppler technique, relation between the posture of an ellipsoidal transparent droplet and the measurement error and the optimal position of sensor for suppressing measurement error was examined. In case of Fraunhofer diffraction method, imaginary size dispersion which appears even if the particles are mono-disperse resembles log-normal distribution. And, it was revealed that so-called optical equivalent diameter is near to the diameter corresponding to averaged area of orthogonal projection. Furthermore, problems in relation to multiple scattering were examined using the merit of computational electromagnetics.
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