Theoretical Analysis of A Buoyant Jet Interacting with Small Amplitude Waves |
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Authors: | Ying-Pin LIN a Hung-Chu HSU b Yang-Yih CHEN a a |
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Institution: | [1]Department of Marine Environment and Engineering, National Sun Yat-Sen Uaivershy , Kaohsiung 804, China [2]Tainan Hydraulics Laboratory, Research Center of Ocean Environment and Technology, National Cheng Kung University, Tainan 701, China |
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Abstract: | A new theoretical solution is presented here for the dynamic characteristics of a buoyant jet due to opposing small amplitude waves.The conservation equations of mass,tangential momentum and vertical momentum are solved by the integral method which encompasses the Gaussian profiles of velocity and density.The action of waves is incorporated into the equations of motion as an external force and a new exact solution is obtained to predict the trajectory,velocity distribution and boundary thickness of the buoyant jet over an arbitrary lateral cross section.It is found that the velocity along the centerline is inversely proportional to the ratio of the momentum of the wave to the buoyant jet.The averaged boundary width varies with the fluctuation of the boundary width,the distance from the orifice and the velocity correction function.Owing to the motion d waves,the fluctuation of the boundary width is proportional to the wave steepness. |
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Keywords: | buoyant jet small amplitude waves radiaton stress jet trajectory |
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