Raindrop fall velocity in turbulent flow: an observational study

Autor: M. Thurai, V. Bringi, P. Gatlin, M. Wingo
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Advances in Science and Research, Vol 18, Pp 33-39 (2021)
Druh dokumentu: article
ISSN: 1992-0628
1992-0636
DOI: 10.5194/asr-18-33-2021
Popis: Laboratory measurements of drop fall speeds by Gunn–Kinzer under still air conditions with pressure corrections of Beard are accepted as the “gold standard”. We present measured fall speeds of 2 and 3 mm raindrops falling in turbulent flow with 2D-video disdrometer (2DVD) and simultaneous measurements of wind velocity fluctuations using a 3D-sonic anemometer. The findings based on six rain events are, (i) the mean fall speed decreases (from the Gunn–Kinzer terminal velocity) with increasing turbulent intensity, and (ii) the standard deviation increases with increase in the rms of the air velocity fluctuations. These findings are compared with other observations reported in the literature.
Databáze: Directory of Open Access Journals
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