Hydraulic Response and Overtopping Performance of Single-Layer Double Cube Unit Armored Mound Breakwater

Round 1

Reviewer 1 Report

The author has designed a new type of friction-interlocking armor unit, called 'Double cube' (DC), and compared its performance with other armor blocks through experiments. The innovative design aims to achieve an optimized shape that provides high structural integrity, high hydraulic stability, and low concrete consumption, while also offering an easy placement method.

 This topic is interesting, but there are still the following issues:

1. It appears to be more of a technical report than a research paper, with superficial analysis and poorly addressed related mechanisms.

2. The experimental results only compare a few statistical parameters and are not sufficient to reveal the mechanism behind why DC is superior to traditional armor blocks. Although the author mentions that DC's shape and placement enhance stability through bringing the center of gravity closer to the underlayer and providing large contact surfaces with surrounding blocks, this explanation seems insufficient. It would be better to combine theoretical or numerical calculations using finite element or computational fluid dynamics methods to gain a deeper understanding of why DC has better performance. 

3. It is unclear whether the experimental results have practical implications for engineering applications. What similar criteria were used in the experiments? Were Reynolds or Froude numbers considered?

4. The obtained experimental results are statistical averages, and the range of error is unknown.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf