The hydroacoustics of a raindrop impact

1992 ◽  
Vol 92 (2) ◽  
pp. 1017-1021 ◽  
Author(s):  
Jeffrey A. Nystuen ◽  
Leo H. Ostwald ◽  
Herman Medwin
Keyword(s):  
Raindrop Impact

scholarly journals Crater formation during raindrop impact on sand

2017 ◽  
Vol 95 (4) ◽  
Author(s):  
Rianne de Jong ◽  
Song-Chuan Zhao ◽  
Devaraj van der Meer
Keyword(s):  
Crater Formation ◽  
Raindrop Impact

Rainfall runoff in soil erosion with simulated rainfall, overland flow and cover

Soil Research ◽  
1983 ◽  
Vol 21 (2) ◽  
pp. 109 ◽  
Author(s):  
MJ Singer ◽  
PH Walker
Keyword(s):  
Soil Erosion ◽  
Soil Loss ◽  
Rainfall Intensity ◽  
Overland Flow ◽  
Podzolic Soil ◽  
Simulated Rainfall ◽  
Rainfall Runoff ◽  
Runoff Water ◽  
Soil Transport ◽  
Raindrop Impact

The 20-100 mm portion of a yellow podzolic soil (Albaqualf) from the Ginninderra Experiment Station (A.C.T.) was used in a rainfall simulator and flume facility to elucidate the interactions between raindrop impact, overland water flow and straw cover as they affect soil erosion. A replicated factorial design compared soil loss in splash and runoff from 50 and 100 mm h-1 rainfall, the equivalent of 100 mm h-1 overland flow, and 50 and 100 mm h-1 rainfall plus the equivalent of 100 mm h-' overland flow, all at 0, 40 and 80% straw cover on a 9% slope. As rainfall intensity increased, soil loss in splash and runoff increased. Within cover levels, the effect of added overland flow was to decrease splash but to increase total soil loss. This is due to an interaction between raindrops and runoff which produces a powerful detaching and transporting mechanism within the flow known as rain-flow transportation. Airsplash is reduced, in part, because of the changes in splash characteristics which accompany changes in depths of runoff water. Rain-flow transportation accounted for at least 64% of soil transport in the experiment and airsplash accounted for no more than 25% of soil transport The effects of rainfall, overland flow and cover treatments, rather than being additive, were found to correlate with a natural log transform of the soil loss data.

scholarly journals Aerosol generation by raindrop impact on soil

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Young Soo Joung ◽  
Cullen R. Buie
Keyword(s):  
Aerosol Generation ◽  
Raindrop Impact

Wind Turbine Blade Coating Fatigue Induced by Raindrop Impact

2020 ◽  
Author(s):  
Weifei Hu ◽  
Weiyi Chen ◽  
Xiaobo Wang ◽  
Zhenyu Liu ◽  
Jianrong Tan ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Crack Growth ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Rain Event ◽  
Rain Intensity ◽  
Texture Model ◽  
The Impact ◽  
Blade Coating ◽  
Raindrop Impact

Abstract With the increase of wind energy production demand, the need to manufacture larger wind turbine blades is on the rise. Because of the high tip speed of the large blade, the blade could be impacted by high-speed objects such as raindrops. This research focuses on developing a computational model for analyzing wind turbine blade coating fatigue induced by raindrop impact. A stochastic rain texture model is used to simulate a realistic rain event determined by a rain intensity and a rain duration. A smoothed particle hydrodynamic approach is implemented to calculate the impact stress considering a single raindrop. A stress interpolation method is proposed to accurately and efficiently estimate the impact of stress under a random rain event. Besides, a crack growth law is used to explain the process of coating shedding. Through a method for calculating crack growth length based on stress, this paper analyzes crack growth life as a function of the rain intensity and the rain duration. This function, together with the statistics of rainfall history, provides a new approach for estimating the expected fatigue life of the blade coating.

scholarly journals Experimental and modelling evidence of short-term effect of raindrop impact on hydraulic conductivity and overland flow intensity

2019 ◽  
Vol 570 ◽  
pp. 401-410 ◽  
Author(s):  
Claude Mügler ◽  
Olivier Ribolzi ◽  
Jean-Louis Janeau ◽  
Emma Rochelle-Newall ◽  
Keooudone Latsachack ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Overland Flow ◽  
Term Effect ◽  
Short Term ◽  
Short Term Effect ◽  
Flow Intensity ◽  
Raindrop Impact
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