Multi-Scale Surface Texturing in Tribology—Current Knowledge and Future Perspectives

Round 1

Reviewer 1 Report

This is well written and comprehensive review paper on multi-scale patterning. While the review on numerical methods and experimental results is quite comprehensive, Authors may consider providing a summary of experimental methods and techniques that have been used to study tribology of patterned surfaces. It would be helpful if authors can highlight some current applications and potential application areas in the near future. 

Author Response

Reviewer 1:

 

This is well written and comprehensive review paper on multi-scale patterning. While the review on numerical methods and experimental results is quite comprehensive, Authors may consider providing a summary of experimental methods and techniques that have been used to study tribology of patterned surfaces. It would be helpful if authors can highlight some current applications and potential application areas in the near future. 

 

Response:

 

Thank you very much for your positive feedback. Regarding to the experimental methods and techniques used to assess the tribological behavior of multi-scale texture, we would like to emphasize that the same techniques as for single-scale textures are used. In this sense, we don’t believe that summarizing the existing techniques leads to any significant new knowledge, since well established test-rigs (ball on disk, pin on disk, four ball tester under different kinematic conditions (linear or rotational motion)) are typically used.

 

Regarding to your second aspect, we have added an additional paragraph in the last section of the manuscript.

 

Reviewer 2:

 

The paper by P.G. Grützmacher et al. presents a comprehensive study on Multi-scale surface texturing in Tribology. The study is well written and addresses state of the art as well as perspectives of the field. I recommend a minor revision after improving the quality of some of the figures presented.
Figures 13,14 15 and 16b The values on the x- and the y-axis, as well as captions in the figures, are unreadable. Please fix this.

 

Response:

 

Thank you very much for your positive feedback. We have fixed the aforementioned aspects regarding the Figures.

 

 

Reviewer 3

 

This manuscript reviews the current state of the art in how surface texturing reduces friction, focusing on both experiments and simulations. The review is concise and well written. I appreciated the summary at the end, which really helped to bring focus to the author's work. I believe that this manuscript should be accepted for publication.  Some areas that could be improved are listed below.

A greater insight into the impact of texture size/aspect ratio may be warranted, as this is a critical parameter in most studies. A reference is missing on page 9 line 346. 

Response:

We appreciate the positive feedback given by the reviewer.

 

 

Reviewer 4:

I think that this is the review paper.

However this review paper does show the just summarizing results for all of references.

All aspects the author address are not new.

So I did not find any new aspects.

Response:

Thank you very much for your comment. In fact, a review manuscript aims at summarizing the existing state of the art of a certain subject. We believe that we have done that regarding the tribological effects induced by multi-scale textures (from an experimental and numerical point of view). In the end of the manuscript, we have provided some future directions, which could be a potential guide for future research.

Reviewer 2 Report

The paper by P.G. Grützmacher et al. presents a comprehensive study on Multi-scale surface texturing in Tribology. The study is well written and addresses state of the art as well as perspectives of the field. I recommend a minor revision after improving the quality of some of the figures presented.
Figures 13,14 15 and 16b The values on the x- and the y-axis, as well as captions in the figures, are unreadable. Please fix this.

Author Response

Reviewer 1:

 

This is well written and comprehensive review paper on multi-scale patterning. While the review on numerical methods and experimental results is quite comprehensive, Authors may consider providing a summary of experimental methods and techniques that have been used to study tribology of patterned surfaces. It would be helpful if authors can highlight some current applications and potential application areas in the near future. 

 

Response:

 

Thank you very much for your positive feedback. Regarding to the experimental methods and techniques used to assess the tribological behavior of multi-scale texture, we would like to emphasize that the same techniques as for single-scale textures are used. In this sense, we don’t believe that summarizing the existing techniques leads to any significant new knowledge, since well established test-rigs (ball on disk, pin on disk, four ball tester under different kinematic conditions (linear or rotational motion)) are typically used.

 

Regarding to your second aspect, we have added an additional paragraph in the last section of the manuscript.

 

Reviewer 2:

 

The paper by P.G. Grützmacher et al. presents a comprehensive study on Multi-scale surface texturing in Tribology. The study is well written and addresses state of the art as well as perspectives of the field. I recommend a minor revision after improving the quality of some of the figures presented.
Figures 13,14 15 and 16b The values on the x- and the y-axis, as well as captions in the figures, are unreadable. Please fix this.

 

Response:

 

Thank you very much for your positive feedback. We have fixed the aforementioned aspects regarding the Figures.

 

 

Reviewer 3

 

This manuscript reviews the current state of the art in how surface texturing reduces friction, focusing on both experiments and simulations. The review is concise and well written. I appreciated the summary at the end, which really helped to bring focus to the author's work. I believe that this manuscript should be accepted for publication.  Some areas that could be improved are listed below.

A greater insight into the impact of texture size/aspect ratio may be warranted, as this is a critical parameter in most studies. A reference is missing on page 9 line 346. 

Response:

We appreciate the positive feedback given by the reviewer.

 

 

Reviewer 4:

I think that this is the review paper.

However this review paper does show the just summarizing results for all of references.

All aspects the author address are not new.

So I did not find any new aspects.

Response:

Thank you very much for your comment. In fact, a review manuscript aims at summarizing the existing state of the art of a certain subject. We believe that we have done that regarding the tribological effects induced by multi-scale textures (from an experimental and numerical point of view). In the end of the manuscript, we have provided some future directions, which could be a potential guide for future research.

Reviewer 3 Report

This manuscript reviews the current state of the art in how surface texturing reduces friction, focusing on both experiments and simulations. The review is concise and well written. I appreciated the summary at the end, which really helped to bring focus to the author's work. I believe that this manuscript should be accepted for publication.  Some areas that could be improved are listed below.

A greater insight into the impact of texture size/aspect ratio may be warranted, as this is a critical parameter in most studies. A reference is missing on page 9 line 346.

Author Response

Reviewer 1:

 

This is well written and comprehensive review paper on multi-scale patterning. While the review on numerical methods and experimental results is quite comprehensive, Authors may consider providing a summary of experimental methods and techniques that have been used to study tribology of patterned surfaces. It would be helpful if authors can highlight some current applications and potential application areas in the near future. 

 

Response:

 

Thank you very much for your positive feedback. Regarding to the experimental methods and techniques used to assess the tribological behavior of multi-scale texture, we would like to emphasize that the same techniques as for single-scale textures are used. In this sense, we don’t believe that summarizing the existing techniques leads to any significant new knowledge, since well established test-rigs (ball on disk, pin on disk, four ball tester under different kinematic conditions (linear or rotational motion)) are typically used.

 

Regarding to your second aspect, we have added an additional paragraph in the last section of the manuscript.

 

Reviewer 2:

 

The paper by P.G. Grützmacher et al. presents a comprehensive study on Multi-scale surface texturing in Tribology. The study is well written and addresses state of the art as well as perspectives of the field. I recommend a minor revision after improving the quality of some of the figures presented.
Figures 13,14 15 and 16b The values on the x- and the y-axis, as well as captions in the figures, are unreadable. Please fix this.

 

Response:

 

Thank you very much for your positive feedback. We have fixed the aforementioned aspects regarding the Figures.

 

 

Reviewer 3

 

This manuscript reviews the current state of the art in how surface texturing reduces friction, focusing on both experiments and simulations. The review is concise and well written. I appreciated the summary at the end, which really helped to bring focus to the author's work. I believe that this manuscript should be accepted for publication.  Some areas that could be improved are listed below.

A greater insight into the impact of texture size/aspect ratio may be warranted, as this is a critical parameter in most studies. A reference is missing on page 9 line 346. 

Response:

We appreciate the positive feedback given by the reviewer.

 

 

Reviewer 4:

I think that this is the review paper.

However this review paper does show the just summarizing results for all of references.

All aspects the author address are not new.

So I did not find any new aspects.

Response:

Thank you very much for your comment. In fact, a review manuscript aims at summarizing the existing state of the art of a certain subject. We believe that we have done that regarding the tribological effects induced by multi-scale textures (from an experimental and numerical point of view). In the end of the manuscript, we have provided some future directions, which could be a potential guide for future research.

Reviewer 4 Report

I think that this is the review paper.

However this review paper does show the just summarizing results for all of references.

All aspects the author address are not new.

So I did not find any new aspects.

Author Response

Reviewer 1:

 

This is well written and comprehensive review paper on multi-scale patterning. While the review on numerical methods and experimental results is quite comprehensive, Authors may consider providing a summary of experimental methods and techniques that have been used to study tribology of patterned surfaces. It would be helpful if authors can highlight some current applications and potential application areas in the near future. 

 

Response:

 

Thank you very much for your positive feedback. Regarding to the experimental methods and techniques used to assess the tribological behavior of multi-scale texture, we would like to emphasize that the same techniques as for single-scale textures are used. In this sense, we don’t believe that summarizing the existing techniques leads to any significant new knowledge, since well established test-rigs (ball on disk, pin on disk, four ball tester under different kinematic conditions (linear or rotational motion)) are typically used.

 

Regarding to your second aspect, we have added an additional paragraph in the last section of the manuscript.

 

Reviewer 2:

 

The paper by P.G. Grützmacher et al. presents a comprehensive study on Multi-scale surface texturing in Tribology. The study is well written and addresses state of the art as well as perspectives of the field. I recommend a minor revision after improving the quality of some of the figures presented.
Figures 13,14 15 and 16b The values on the x- and the y-axis, as well as captions in the figures, are unreadable. Please fix this.

 

Response:

 

Thank you very much for your positive feedback. We have fixed the aforementioned aspects regarding the Figures.

 

 

Reviewer 3

 

This manuscript reviews the current state of the art in how surface texturing reduces friction, focusing on both experiments and simulations. The review is concise and well written. I appreciated the summary at the end, which really helped to bring focus to the author's work. I believe that this manuscript should be accepted for publication.  Some areas that could be improved are listed below.

A greater insight into the impact of texture size/aspect ratio may be warranted, as this is a critical parameter in most studies. A reference is missing on page 9 line 346. 

Response:

We appreciate the positive feedback given by the reviewer.

 

 

Reviewer 4:

I think that this is the review paper.

However this review paper does show the just summarizing results for all of references.

All aspects the author address are not new.

So I did not find any new aspects.

Response:

Thank you very much for your comment. In fact, a review manuscript aims at summarizing the existing state of the art of a certain subject. We believe that we have done that regarding the tribological effects induced by multi-scale textures (from an experimental and numerical point of view). In the end of the manuscript, we have provided some future directions, which could be a potential guide for future research.