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<p>In coastal engineering, structures with inclined front slopes are commonly employed. This study utilizes the Smoothed Particle Hydrodynamics (SPH) method to scrutinize non-breaking undular surge-inclined wall interactions under still-water base flow conditions. Specifically, we numerically investigated and quantified the hydrodynamic responses of inclined walls across five inclination angles (spanning − 30° to 30°) under six distinct incident surge conditions characterized by varying surge amplitudes. Although undular surges and solitary waves share similar wavefront profiles, notable disparities were observed in their underlying velocity fields. Nevertheless, the maximum run-up heights of the undular surges on inclined walls closely aligned with solitary wave results on vertical walls, with a maximum deviation of 7.24%. The maximum surge pressure consistently occurred at the still-water level, which is irrespective of the wall inclination, while inclined walls were subjected to greater forces. Based on these findings, we establish predictive models for both the maximum surge pressure and the surge force acting on inclined walls during undular surge-inclined wall interactions. Additionally, two distinct dispersion regimes in undular surge evolution were identified, with a transition occurring at a wave steepness of 0.028, a finding that offers new insights into the nonlinear evolution of undular surges.</p>

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Hydrodynamic characterization of non-breaking undular surges interacting with inclined coastal structures

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Feidong Zheng,
  • Zongliang Zhang,
  • Qiang Liu,
  • Xueming Wu,
  • Yang Yang,
  • Chao Wang,
  • Cuixia Yao,
  • Xiaozi Lin,
  • Tingjie Huang

摘要

In coastal engineering, structures with inclined front slopes are commonly employed. This study utilizes the Smoothed Particle Hydrodynamics (SPH) method to scrutinize non-breaking undular surge-inclined wall interactions under still-water base flow conditions. Specifically, we numerically investigated and quantified the hydrodynamic responses of inclined walls across five inclination angles (spanning − 30° to 30°) under six distinct incident surge conditions characterized by varying surge amplitudes. Although undular surges and solitary waves share similar wavefront profiles, notable disparities were observed in their underlying velocity fields. Nevertheless, the maximum run-up heights of the undular surges on inclined walls closely aligned with solitary wave results on vertical walls, with a maximum deviation of 7.24%. The maximum surge pressure consistently occurred at the still-water level, which is irrespective of the wall inclination, while inclined walls were subjected to greater forces. Based on these findings, we establish predictive models for both the maximum surge pressure and the surge force acting on inclined walls during undular surge-inclined wall interactions. Additionally, two distinct dispersion regimes in undular surge evolution were identified, with a transition occurring at a wave steepness of 0.028, a finding that offers new insights into the nonlinear evolution of undular surges.