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هفتمین کنگره ملی مهندسی عمران
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  • wave period mike21-bw numerical sea wave diffraction

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1253
    • تعداد پرسش و پاسخ ها: 0
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    the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings, while the diffracted wave crests in the lee of the border will form approximately concentric circular arcs with the wave height decreasing exponentially along the crests. by using an appropriate cfd software like “dhi mike21-bw model” (based on boussinesq wave theory) wave diffraction would easily be described and by describing and considering it in designing of project so many critical events such as earthquake and tsunami can be avoided. wave period (t) is a one of basic characteristics of any wave, generated randomly or regularly, which measures the size of the wave in time. to assess the impacts that different wave periods cause on coastal regions, studies that evaluate the hydrodynamic behaviour and wave diffraction in sea water are necessary. a calibrated model is a suitable background for examination of different wave periods. in this paper by using the computer model, the affection of the wave period change on the diffraction will be discussed. meanwhile, for calibrating the model reputed “wave diffraction diagrams” has been used, which will be discussed in appropriate section. it is concluded in these specific models and with its characteristics by increasing the wave period the wave height and the diffraction coefficient will be decreased. but depend on different data line nodes (distance from the opening), the behaviour of the curves may change.

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