PONE-D-20-07188

A Smoothed Particle Hydrodynamics study of Rayleigh collapse for a cylindrical cavity

PLOS ONE

Dear Dr. Albano,

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Academic Editor

PLOS ONE

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Additional Editor Comments (if provided):

This is a fundamental study on Rayleigh collapse of a cylindrical cavity using a computational technique called smoothed particle hydrodynamics. It is suitable for publication with minor revisions following the first referee's comments and my technical review comments below:

1. Since this study involves the use of computational software, it would need to be deposited as an open access software. I personally use GitHub, but please consult the PLoS One requirements on software for guidance.

2. The energy balance equation includes both viscous dissipation and thermal diffusion. It is not clear if these effects are being separated out when the authors talk about investigating "heat diffusion". The wording "heat diffusion" is awkward. Heat is the transfer of energy by virtue of temperature differences. We often use the term thermal diffusion when referring to Fourier's Law since it is expresses heat as being proportional to temperature differences. It is not clear how viscous dissipation is separated or lumped into the energy analysis.

3. There is a typo in Eq. 8, the pressure tensor is missing.

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: N/A

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: Review on ‘A Smoothed Particle Hydrodynamics study of Rayleigh collapse for a cylindrical cavity’

Authors of this manuscript consider the collapse problem for an empty and gas-filled cavity. Authors propose a numerical approach which allows them to directly solve governing hydrodynamic equations for the cavity dynamics taking into account heat transfer. The main result of this manuscript is that the heat transfer may have a substantial impact on bubble’s collapse and should be taken into consideration when certain conditions are satisfied.

On the whole, I believe that this manuscript is suitable for publication. However, I have some remarks which authors should take into consideration:

1) Rayleigh collapse is usually associated with a spherical cavity. Thus, it seems that it might be more appropriate to change the title of the manuscript to ‘A Smoothed Particle Hydrodynamics study of the collapse for a cylindrical cavity’

1) It may be useful to compare the results of this manuscript with the results of the works where heat transfer was taken into account in Rayleigh-Plesset like models (see, e.g. A. Prosperetti, J. Fluid Mech. 222 (1991) 587–616., Stricker L., Prosperetti A., Lohse D. J. Acc. Soc. Am. 130 (2011) 3243-3251.)

3) For the verification of the numerical approach authors may also use the experimental and theoretical results from works D. Obreschkow, M. Bruderer, M. Farhat, Phys. Rev. E. 85 (2012) 066303, D. Obreschkow, M. Tinguely, N. Dorsaz, P. Kobel, A. de Bosset, M. Farhat, Exp. Fluids. 54 (2013) 1503.

4) Reference 15 has two authors. Thus, it should be cited in the text of the manuscript either by its number or by the last names of both authors. I would also like to draw attention of the authors to another work on analytical studying of bubbles dynamics (N.A. Kudryashov, D.I. Sinelshchikov, Phys. Lett. A 379 (2015) 798–802.), where surface tension was taken into account.

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Reviewer #1: No

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A Smoothed Particle Hydrodynamics study of the collapse for a cylindrical cavity

PONE-D-20-07188R1

Dear Dr. Albano,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Michael H Peters

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: I Don't Know

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4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: (No Response)

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

**********

6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: In my opinion the authors revised the manuscript in accordance with all remarks and I believe that the manuscript can be published in the present form.

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: No