Three-Dimensional Couette Flow of a Second-Grade Fluid Along Periodic Injection/Suction
Round 1
Reviewer 1 Report
The major comment of the reviewer for the manuscript is that if it is suitable to be published on COATINGS. The coatings-517096 provided analytical analysis on the couette flow of a second-grade fluid with periodic injection/suction in details; however, it seems that its relevance with surface coating is weak. Additionally, there are several minor comments to be considered.
1. The quality of figure 1 is low and should be improved.
2. The authors should give a detailed derivation of Equations (8)-(10). Why the α2 disappeared in Equations (8)-(10).
3. Every symbol should be explained in the text, its seems that some symbol description are missing, such as V, t*, etc.
Author Response
Reviewer #1 Comments
|
Comment |
|
|
1 |
The quality of Figure 1 is low and should be improved |
|
Action Taken |
|
|
The quality of figure is improved accordingly. |
|
|
Comment |
|
|
2 |
The authors should give a detailed derivation of Equations (8)-(10). Why the α2 disappeared in Equations (8)-(10). |
|
Action Taken |
|
|
The detailed derivations of Equations (8)-(10) is given at the end of this document. |
|
|
Comment |
|
|
3 |
Every symbol should be explained in the text, its seems that some symbol description are missing, such as Vo, t*, etc. |
|
Action Taken |
|
|
We have rechecked the manuscript thoroughly and found no symbol without explanation except these mentioned symbols as per detail: Vo is the injection/suction velocity and which was already mentioned on page # 2, line # 57. t* is non-dimensional time which has been mentioned on page # 3, line # 72. |
|
Reviewer 2 Report
This paper deals with "three-dimensional Couette flow of a second-grade fluid along periodic injection/suction".
However, the reviewer does not think the paper in its current form suitable for publication in "Coatings". The main reason would be that it is not particularly original in its approach and does not add anything to the already published technical literature. From the engineering point of view, the effects of Reynolds number, injection/suction and non-Newtonian parameter are very interesting, but the obtained results should be verified by the experimental phenomena of the simple two-dimensional Couette flow without suction/injection in the published literatures.
To the reviewer's opinion, based on the preceding remarks, the paper is not appropriate for publication in "Coatings".
Author Response
Reviewer #2 Comments
|
Comment |
|
|
1 |
It is not particularly original in its approach and does not add anything to the already published technical literature. |
|
Action Taken |
|
|
According to authors knowledge three-dimensional Couette flow of the second-grade fluid with transverse sinusoidal injection/suction velocity has not yet been addressed. It means our results contribute new addition to literature for scientific community. In fact, a constant injection or suction velocity at the plane tends to two-dimensional flow [2], however, because of varying suction velocity in perpendicular direction on plane the problem becomes three-dimensional. |
|
|
Comment |
|
|
2 |
From the engineering point of view, the effects of Reynolds number, injection/suction and non-Newtonian parameter are very interesting, but the obtained results should be verified by the experimental phenomena of the simple two-dimensional Couette flow without suction/injection in the published literatures. |
|
Action Taken |
|
|
The impact of Reynolds number, injection/suction and non-Newtonian parameter are very interesting from the engineering point of view and viscous results in the absence of MHD of [12] are recovered by setting K=0 |
|
Reviewer 3 Report
The authors presented the three dimensional Couette flow of the second grade fluid with periodic injection/suction of the lower/upper plates. The perturbation method is used for the solution of the PDE. The paper might be acceptable for publication with minor observations:
- Some kind of validation for the solution model is missing;
- Please describe the physical meaning of the “favorable pressure”, used on p. 13;
- The English language has to be verified.
Author Response
Reviewer #3 Comments
|
Comment |
|
|
1 |
Some kind of validation for the solution model is missing |
|
Action Taken |
|
|
Viscous results in the absence of MHD effect [12] are recovered when K=0 page # 9, line # 274. |
|
|
Comment |
|
|
2 |
Please describe the physical meaning of the “favorable pressure”, used on page # 13 |
|
Action Taken |
|
|
Favorable pressure means that support the fluid flow. |
|
|
Comment |
|
|
3 |
The English language has to be verified. |
|
Action Taken |
|
|
The manuscript has been rechecked thoroughly and typo mistakes has been removed. |
|
Round 2
Reviewer 1 Report
I satisfy the author's response to the minor comment in my first-round review. However, the authors didn't give a proper response to my major comment, that is, if the present work is suitable to be published in COATINGS. To answer this comment, the authors should add necessary description in the Introduction section. Maybe the author can cite some literatures on the couette flow in microchannel with coated walls. In addition, what is the scale of the channel with periodic injection/suction. For the microchannel, there are some interfacial properties such as electric double laryer should be considered, some latest literature, for example, Jing and Yi, doi: 10.1142/S0218348X19500956 involve the relevant field should be cited, the literature should be cited and the problem should be addressed in the manuscript.
Author Response
Reviewer 1 Comments and Suggestions for Authors
I satisfy the author's response to the minor comment in my first-round review. However, the authors didn't give a proper response to my major comment, that is, if the present work is suitable to be published in COATINGS. To answer this comment, the authors should add necessary description in the Introduction section. Maybe the author can cite some literatures on the Couette flow in microchannel with coated walls. In addition, what is the scale of the channel with periodic injection/suction. For the microchannel, there are some interfacial properties such as electric double laryer should be considered, some latest literature, for example, Jing and Yi, doi: 10.1142/S0218348X19500956 involve the relevant field should be cited, the literature should be cited and the problem should be addressed in the manuscript.
Author’s Response
We appreciate valuable comments of the worthy reviewer to enhance importance and integrity of the manuscript. As suggested by the reviewer we have revisited the introduction section and added some references related to Couette flow. In addition, latest literature, doi: 10.1142/S0218348X19500956 has been also cited.
Author Response File: 
Author Response.docx
Reviewer 2 Report
I have a couple of comments throughout your paper.
From the engineering point of view, the effects of Reynolds number, injection/suction and non-Newtonian parameter are very interesting.
Do you proof the theory by experiments?
The obtained results should be verified by the experimental phenomena of the simple two-dimensional Couette flow without suction/injection.
Author Response
Reviewer 2 Comments and Suggestions for Authors
I have a couple of comments throughout your paper.
From the engineering point of view, the effects of Reynolds number, injection/suction and non-Newtonian parameter are very interesting.
Do you proof the theory by experiments?
The obtained results should be verified by the experimental phenomena of the simple two-dimensional Couette flow without suction/injection.
Author’s Response
We are grateful to worthy reviewer for valuable comments for improvement of the manuscript. The effects of Reynolds number, injection/suction and non-Newtonian parameters, no doubt, are important according to engineering point of view, and these are discussed according to their physical nature. Since scope of our study is theoretical investigation, therefore we have predicted and presented these results theoretically. Now the field is opened for engineers to validate the results experimentally.
Author Response File: Author Response.docx
