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Reflection and Transmission Coefficients by a Circular Pile Breakwater  

Cho, Il-Hyoung (Department of Marine Industrial Engineering, Cheju National University)
Koh, Hyeok-Jun (Department of Marine Industrial Engineering, Cheju National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.19, no.1, 2007 , pp. 38-44 More about this Journal
Abstract
Using the mathematical model suggested by Bennet et al.(1992), the reflection and transmission coefficients by a circular pile breakwater has been investigated in the framework of potential theory. Flow separation due to sudden contraction and expansion is generated and is the main cause of significant energy loss. Therefore, evaluation of exact energy loss coefficient is critical to enhance the reliability of mathematical model. To obtain the energy loss coefficient, 2-dimensional turbulent flow is analyzed using the FLUENT commercial code. The energy loss coefficient can be obtained from the pressure difference between upstream and downstream. Energy loss coefficient is the function of porosity and the relation equation between them is suggested throughout the curve fitting processing. To validated the suggested relation, comparison between the analytical results and the experimental results is made for four different porosities with good agreement.
Keywords
energy loss coefficient; pile breakwater; reflection coefficient; separation; transmission coefficient; turbulent flow;
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Times Cited By KSCI : 2  (Citation Analysis)
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