In this study, wind wave simulations were conducted under experimental-scale conditions using waves2Foam in OpenFOAM to evaluate whether the wind’s effect on waves is appropriately reproduced. The wave development process, along with the behavior of the pressure field and velocity distribution, was analyzed. The simulation results revealed the formation of rotational flows around wave crests and troughs, as well as pressure reduction on the leeward side and pressure increase on the windward side of the waves features consistent with the sheltering effect proposed by Jeffreys. In addition, with increasing fetch, the spectral peak shifted toward lower frequencies, and both significant wave height and period increased. On the other hand, the wave height and period simulated with OpenFOAM tended to be overestimated compared to the experiment. Since this was already overestimated, where wave generation begins, the discrepancy is likely due to differences in the wind velocity distribution at the inlet.

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Numerical Analysis of the Wave Development Process Induced by Wind Using OpenFOAM

  • Jinji Umeda,
  • Sota Nakajo,
  • Takaaki Shigematsu,
  • Natsuki Mizutani

摘要

In this study, wind wave simulations were conducted under experimental-scale conditions using waves2Foam in OpenFOAM to evaluate whether the wind’s effect on waves is appropriately reproduced. The wave development process, along with the behavior of the pressure field and velocity distribution, was analyzed. The simulation results revealed the formation of rotational flows around wave crests and troughs, as well as pressure reduction on the leeward side and pressure increase on the windward side of the waves features consistent with the sheltering effect proposed by Jeffreys. In addition, with increasing fetch, the spectral peak shifted toward lower frequencies, and both significant wave height and period increased. On the other hand, the wave height and period simulated with OpenFOAM tended to be overestimated compared to the experiment. Since this was already overestimated, where wave generation begins, the discrepancy is likely due to differences in the wind velocity distribution at the inlet.