The second harmonic resonance for the shallow water surface-wave in a rectangular trough

1988 ◽  
Vol 9 (10) ◽  
pp. 1005-1011
Author(s):  
Huang Guo-xiang ◽  
Yan Jia-ren ◽  
Zou Feng-wu
Keyword(s):  
Surface Wave ◽  
Shallow Water ◽  
Water Surface ◽  
Second Harmonic ◽  
Harmonic Resonance

scholarly journals Performance Study of a Floricultural Greenhouse Surrounded by Shallow Water Ponds

2017 ◽  
Vol 6 (2) ◽  
pp. 137
Author(s):  
Debajit Misra ◽  
Sudip Ghosh
Keyword(s):  
Shallow Water ◽  
Water Surface ◽  
Natural Ventilation ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Free Water ◽  
Weather Data ◽  
Ventilation Mode ◽  
Performance Study ◽  
Tropical Regions

In the present paper, an innovative low energy-intensive evaporative cooling system has been proposed for greenhouse application in near-tropical regions dominated by hot climate. The system can operate under dual- ventilation mode to maintain a favourable microclimate inside the greenhouse. A single ridge type un-even span greenhouse has been considered, targeting a few species of Indian tropical flowers. The greenhouse has a continuous roof vent as well as adjustable side vents and is equipped with exhaust fans on top and roll-up curtains on the sides. The greenhouse is surrounded by shallow water ponds outside its longitudinal walls and evaporative surfaces partially cover the free water surface. Inside the pond, low cost evaporative surfaces are so placed that they form air channels.  Thus, outside air flows through the channels formed by the wetted surfaces over the water surface and undergoes evaporative cooling before entering the greenhouse. A simplified theoretical model has been presented in this paper to predict the inside greenhouse air temperature while ambient weather data are used as model inputs. The study reveals that during average radiation periods, the greenhouse can depends solely on natural ventilation and during peak radiation hours fan-induced ventilation is needed to maintain the required level of temperature. It is seen that under dual-ventilation mode greenhouse, temperature can be kept 3-6 oC lower than ambient temperature when saturation effectiveness is 0.7 and with 75% shading. Keywords: Greenhouse, Evaporative Cooling, Ventilation, Saturation Effectiveness, Wetted SurfaceArticle History: Received February 25th 2017; Received in revised form April 14th 2017; Accepted May 4th 2017; Available onlineHow to Cite This Article: Misra, D. and Ghosh, S., (2017) Performance Study of a Floricultural Greenhouse Surrounded by Shallow Water Ponds. International Journal of Renewable Energy Develeopment, 6(2), 137-144.https://doi.org/10.14710/ijred.6.2.137-144

Cuspon-type Waves and Their Properties

2021 ◽  
Vol 24 (2) ◽  
pp. 145-155
Author(s):  
G. Omel’yanov
Keyword(s):  
Shallow Water ◽  
Traveling Waves ◽  
Water Surface ◽  
First Derivative ◽  
Shallow Water Approximation

The general Degasperis-Prosesi equation (gDP) describes the evolution of the water surface in a unidirectional shallow water approximation. We consider essentially non-integrable versions of this model and analyze their cuspon-type solutions, that is continuous traveling waves with the unbounded first derivative.

Influence of Water Surface Wave Disturbance on Wireless Optical Communication

2021 ◽  
Vol 41 (7) ◽  
pp. 0706005
Author(s):  
李军 Li Jun ◽  
罗江华 Luo Jianghua ◽  
元秀华 Yuan Xiuhua
Keyword(s):  
Surface Wave ◽  
Optical Communication ◽  
Water Surface ◽  
Wave Disturbance ◽  
Wireless Optical Communication ◽  
Influence Of Water
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