Academic Journal
Measuring droplet fall speed with a high-speed camera: indoor accuracy and potential outdoor applications
| العنوان: | Measuring droplet fall speed with a high-speed camera: indoor accuracy and potential outdoor applications |
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| المؤلفون: | C.-K. Yu, P.-R. Hsieh, S. E. Yuter, L.-W. Cheng, C.-L. Tsai, C.-Y. Lin, Y. Chen |
| المصدر: | Atmospheric Measurement Techniques, Vol 9, Iss 4, Pp 1755-1766 (2016) |
| بيانات النشر: | Copernicus Publications, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Environmental engineering LCC:Earthwork. Foundations |
| مصطلحات موضوعية: | Environmental engineering, TA170-171, Earthwork. Foundations, TA715-787 |
| الوصف: | Acquisition of accurate raindrop fall speed measurements outdoors in natural rain by means of moderate-cost and easy-to-use devices represents a long-standing and challenging issue in the meteorological community. Feasibility experiments were conducted to evaluate the indoor accuracy of fall speed measurements made with a high-speed camera and to evaluate its capability for outdoor applications. An indoor experiment operating in calm conditions showed that the high-speed imaging technique can provide fall speed measurements with a mean error of 4.1–9.7 % compared to Gunn and Kinzer's empirical fall-speed–size relationship for typical sizes of rain and drizzle drops. Results obtained using the same apparatus outside in summer afternoon showers indicated larger positive and negative velocity deviations compared to the indoor measurements. These observed deviations suggest that ambient flow and turbulence play a role in modifying drop fall speeds which can be quantified with future outdoor high-speed camera measurements. Because the fall speed measurements, as presented in this article, are analyzed on the basis of tracking individual, specific raindrops, sampling uncertainties commonly found in the widely adopted optical disdrometers can be significantly mitigated. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1867-1381 1867-8548 |
| Relation: | http://www.atmos-meas-tech.net/9/1755/2016/amt-9-1755-2016.pdf; https://doaj.org/toc/1867-1381; https://doaj.org/toc/1867-8548 |
| DOI: | 10.5194/amt-9-1755-2016 |
| URL الوصول: | https://doaj.org/article/e618164cab994a91bb0e1a4b1d3d4069 |
| رقم الانضمام: | edsdoj.618164cab994a91bb0e1a4b1d3d4069 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 18671381 18678548 |
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| DOI: | 10.5194/amt-9-1755-2016 |