Research on the Inertial Migration Characteristics of Bi-Disperse Particles in Channel Flow
Round 1
Reviewer 1 Report
Dear Authors,
Firstly, The method, model setup, assumptions and even many of the results and conclusions are similar to already published articled by same authors last year :
https://link.springer.com/article/10.1007/s10404-020-2329-4 (Stability condition of self‑organizing staggered particle trains in channel flow; Microfluidics and Nanofluidics volume 24, Article number: 25 (2020))
Only section that is an addendum to your previous Microfluidics and Nanofluidics paper is when particle sizes are different. In this manuscript, 2 particles with different sizes are studied section 4.2.1 onwards.
Previous paper only studied for one size of the particles in a train of 12.
So, please cite all the results as marked out as previous report to the previous paper.
Secondly, no experimental results are reported to validate the simulation of the new reports ( with different particle sizes).
Thirdly, some minor typographical and other errors need revision.
Please see attached marked document for specific items.
I propose that the authors wait to publish after experimental results are available ( similar to the Micro and Nanofluidics paper) and also maybe, greater range of conditions studied to make this a more original publication ( maybe introduce other physical/ electrostatic/hydrodynamic conditions).
At this time, I consider the manuscript as not having sufficient original merit and scientific validation. Hence, until a major revision/addition is done, it is not suitable for publication in this journal.
Thanks for understanding
Comments for author File: 
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Author Response
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Author Response File: 
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Reviewer 2 Report
In this article, the authors have used the LBM method to study the inertial migration of two consecutive particles in single-scale and dual-scale cases. Particle-Particle interaction and their collective movements are well studied previously by Lee W. et al, that the authors already referred in the references. The authors used the LBM method to further study the particle movement. Although the idea of this study is interesting and the results are well interpreted, it is difficult to conceptually understand the particle-particle interaction and their movement by looking at all the figures. Especially, Fig. 8 does not tell how the two particles move when the are located. The authors should represent the schematic illustration in single-cale and dual-scale cases how they move and interact.Author Response
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Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
Dear Authors,
Thank you for your response and incorporating necessary and suggested changes into the manuscript.
Besides a minor revision, I have elected to borderline accept this paper for publication as a full original research paper in this journal. Please refer attached for details.
Best Regards
Comments for author File: Comments.docx
Author Response
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Author Response File: Author Response.docx
Reviewer 2 Report
I recommend this work to be published in this journal.
Author Response
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Author Response File: Author Response.docx
