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Wave attenuation by inclined porous plates using dual boundary element method

조일형|한현주
대한조선학회 (The Society Of Naval Architects Of Korea)|2023.12|International Journal of Naval Architecture and Ocean Engineering|제15권 |pp. 1-14|DOI 10.1016/j.ijnaoe.2023.100552

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참고문헌

키워드

Reflection coefficientExperimentsWave attenuationInclined porous plateDual boundary element method
주제분류조선공학

초록

In this study, the wave attenuation by the inclined porous plates has been evaluated through a numerical approach. As a numerical method, we used the dual boundary element method (DBEM) that solves two distinct boundary integral equations (singular and hyper-singular) derived at the coincident source points on each side of the degenerate plate boundary. A quadratic velocity model with the porositydependent drag coefficient is adopted to account for energy dissipation through the porous plate. The developed DBEM tool is validated through the comparison with self-conducted experiments at a twodimensional wave tank. Then it is used to assess the reflection coefficients and wave forces with various design parameters such as porosities, inclined angles, plate arrangements, and wave characteristics. The dual inclined porous plates arranged in either a serial or parallel configuration did not enhance the wave-absorbing efficiency significantly, compared to a single inclined porous plate with optimal values of porosity (P ¼ 0.1) and inclined angle (q ¼ 10).

Abstract

In this study, the wave attenuation by the inclined porous plates has been evaluated through a numerical approach. As a numerical method, we used the dual boundary element method (DBEM) that solves two distinct boundary integral equations (singular and hyper-singular) derived at the coincident source points on each side of the degenerate plate boundary. A quadratic velocity model with the porositydependent drag coefficient is adopted to account for energy dissipation through the porous plate. The developed DBEM tool is validated through the comparison with self-conducted experiments at a twodimensional wave tank. Then it is used to assess the reflection coefficients and wave forces with various design parameters such as porosities, inclined angles, plate arrangements, and wave characteristics. The dual inclined porous plates arranged in either a serial or parallel configuration did not enhance the wave-absorbing efficiency significantly, compared to a single inclined porous plate with optimal values of porosity (P ¼ 0.1) and inclined angle (q ¼ 10).

참고문헌 (33)

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