Large Scale Experimental Study on Waves and Submerged Horizontal Cylinders

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The manuscript is well written and is really useful for ocean engineers. I have following queries / suggestions 

1) I suggest the authors to define the parameters of Table - 1. 

2) Line 88, replacing 'causing' by "caused".

3) Lines 170-171 and further, indicate the First order and Second order forces with symbols so that the readers will understand the discussion with respect to figures. 

4) Indicate about first and second order forces, what do they mean? How they are important in ocean engineering? 

5) Authors mention that first order forces are directly proportional to wave height while second order forces are proportional to square of the wave height. Please justify with equations in Figures?

6) What is D/L in Figures 12 and 13? As D is not defined. 

7) Check the non-dimensionality of first and second order forces in Figures 12, 13, 16 and 17. Also symbols in these figures are same. I suggest to use different symbols to understand varying conditions of study.

8) Figure 14 shows the first order force Fz is greater than that of Fx and it is reverse for second order force, please check. 

9) Abstract shall include the results. 

10) Overall, grammatical correction is required. 

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

The article presents a physical model experiment aimed at investigating the interaction between regular waves and submerged horizontal cylinders. The study analyzes the surface pressure distribution and overall force of submerged horizontal cylinders at different depths and in waves with varying heights and periods, under high Reynolds numbers. The research is well-written and follows traditional methods, which can provide fundamental assistance for numerical models. However, the article needs to address the following comments before it can be accepted.

 

1. The distribution of pressure sensors along the cylinder needs to be provided.

2. The expression for calculating the wave force on a cylinder needs to be introduced.

3. Previous studies have used KC numbers to describe the relevant hydrodynamic characteristics to calculate waves and submerged cylinders. Therefore, the range of KC numbers in this study needs to be provided.

4. For calculating reflected waves using the three-point method, some simple expressions need to be given.

5. Some expressions need to be unified in one paper, such as the experiment device, sometimes using wave tank, sometimes using wave flume.

6. Based on the information provided in Figures 12 and 13, it can be inferred that the diffraction is negligible as the D/L value of all the tests is less than 0.2. However, the article mentions that the large-scale cylinders used in the experiment, combined with the large Reynolds number flow state, resulted in an evident diffraction phenomenon. Therefore, it is recommended to conduct further investigation to determine the causes and effects of this phenomenon.

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

Minor revision is suggested. Please see the attachment.

Comments for author File: Comments.pdf

Comments on the Quality of English Language

Minor editing of English language is required.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf