The experimental study on infra-gravity wave

Hwung Hweng Hwung, Yu Hsien Lin, Shih Chun Hsiao

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A series of experiments were conducted in a super-wave flume (300 m×5 m×5.2 m) to examine the low-frequency motion induced by waves with different incident steepness, sloping gradients and normalized frequency (sideband space). Two kinds of waves including initial uniform wave train and modulated wave train (one carrier with a pair of sidebands) are utilized for incident wave conditions. From the experimental results, it is found that for a given slope gradient the infra-gravity wave component decreases as wave nonlinearity increases and frequency downshift is a predominant factor. Furthermore, the magnitude of low-frequency component decreases with slope gradients for a given initial wave condition. In addition, the maximum value of low-frequency motion is found to be close to the normalized frequency, δ = 1.0.

Original languageEnglish
Pages (from-to)1481-1495
Number of pages15
JournalOcean Engineering
Issue number10
Publication statusPublished - 2007 Jul

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Ocean Engineering


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