Study on Bubble Cavitation in Liquids for Bubbles Arranged in a Columnar Bubble Group

Round 1

Reviewer 1 Report

The authors performed a study on bubble cavitation in a liquid for bubble arranged in a line, for 5 and 7 bubbles, respectively. I would probably try to reflect that in the title.

The authors are highly encouraged to run the manuscript by a native English speaker.

Please use consistent font size for all the equations. Line 93: add a reference for Euler’s approximation Not very clear how Figures 2 and 3 were obtained. If experimental, describe the experiments. If theoretical, what parameters were used? Is this related to air bubbles in de-ionized water, or something else? Did the authors get permission to publish Fig 7? What is the reason for showing Fig 7? Needs more discussion. Figure 11: please use different symbols for easier visualization Please explain what “R-P equation” is What is the “Fluent software”? Please provide a short description, and a reference.

Overall, an interesting study, but it is not clear what is novel. Most of the statements in the introduction are very general and also well-known. I cannot recommend this manuscript for publication in this form; needs significant improvement.

Reviewer 2 Report

The article deals with the simulation of the bubble group instability related to growth, shrinkage and collapsing of bubbles.

The article needs to be corrected to make it more readable to the interested reader Equations 1-11 are not written with the same letter size. All letter sizes in equations should be written with the same size. (E.g. equations 4 and 7 cannot be read on paper print and should be read-only after zooming on the computer. Axis titles on figures 2,3,4,11 must be made with the same size and must be large enough in size to be readable on paper print. Line 144 - there is no previous explanation for “CCD” Line 207 - there is no previous explanation for “R-P equation”

 

Major part of the paper presents the results of the fluid flow simulations.

according to the legend at the bottom of the images shown on Fig. 6,8,9,10 the dimension scale is not the same. The dimension scale should be the same to make the comparison clearer. there is no information’s about the mathematical model and numerical model applied in Fluent software. there is no info about boundary conditions, numerical mesh size, numerical mesh generation, etc. Such information should be added to the manuscript.