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Numerical Simulation of Tsunami-Like Flow Interaction with Vertical Seawalls with and Without Recurve on the Top Using OpenFOAM
Seawalls, designed to protect coastal areas from the impact of waves and storm surges, failed during past tsunami events due to immense force and energy. The impact of a tsunami on seawalls depends on various factors, including the shape of the seawall. Hence, the present study is motivated towards understanding the difference in the force characteristics of the two types of seawalls (vertical seawall (VW) and vertical seawall with a recurve on top (LRC), which are common along many coasts) during tsunami-like flow interaction under different overtopping conditions. An open-source CFD solver called OpenFOAM is used for numerical simulations. A dam-break-like scenario replicated the tsunami inundation. The study findings revealed that during the flow interaction, both the seawalls experienced impulsive force followed by quasi-static force during the quasi-steady flow phase, with the low-height seawall experiencing maximum force during the initial impulsive force. Pressure distribution over the depth of the seawall revealed an enormous pressure at the recurve. Hence, LRC experienced comparatively a higher force and overturning moment than VW. Further, the LRC experienced a significant uplift force due to the recurve; the dependence factors have been discussed in the paper. The present article identifies VW as a hydrodynamically efficient structure for tsunami-like flows compared to LRC.
Numerical Simulation of Tsunami-Like Flow Interaction with Vertical Seawalls with and Without Recurve on the Top Using OpenFOAM
Seawalls, designed to protect coastal areas from the impact of waves and storm surges, failed during past tsunami events due to immense force and energy. The impact of a tsunami on seawalls depends on various factors, including the shape of the seawall. Hence, the present study is motivated towards understanding the difference in the force characteristics of the two types of seawalls (vertical seawall (VW) and vertical seawall with a recurve on top (LRC), which are common along many coasts) during tsunami-like flow interaction under different overtopping conditions. An open-source CFD solver called OpenFOAM is used for numerical simulations. A dam-break-like scenario replicated the tsunami inundation. The study findings revealed that during the flow interaction, both the seawalls experienced impulsive force followed by quasi-static force during the quasi-steady flow phase, with the low-height seawall experiencing maximum force during the initial impulsive force. Pressure distribution over the depth of the seawall revealed an enormous pressure at the recurve. Hence, LRC experienced comparatively a higher force and overturning moment than VW. Further, the LRC experienced a significant uplift force due to the recurve; the dependence factors have been discussed in the paper. The present article identifies VW as a hydrodynamically efficient structure for tsunami-like flows compared to LRC.
Numerical Simulation of Tsunami-Like Flow Interaction with Vertical Seawalls with and Without Recurve on the Top Using OpenFOAM
Lecture Notes in Civil Engineering
Pandey, Manish (editor) / Umamahesh, N. V. (editor) / Oliveto, Giuseppe (editor) / Ramana, G. V. (editor) / Harish, S. (author) / Sriram, V. (author) / Schüttrumpf, Holger (author) / Sannasiraj, S. A. (author)
International Conference on Hydraulics, Water Resources and Coastal Engineering ; 2023 ; Warangal, India
2025-03-02
18 pages
Article/Chapter (Book)
Electronic Resource
English
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