Elasto-Inertial Particle Focusing in Microchannel with T-Shaped Cross-Section
Round 1
Reviewer 1 Report
The author proposed a method of particle focusing with various T-shaped cross-sections in a viscoelastic solution, and they described the fabrication method of the T-shaped channel. They explained the reason for this focusing behavior through numerical simulation. It is a detailed and complete work. However, some problems must be modified before publishing.
1. Page 6 line 214, the author said the particle diameter is 5 and 10 μm, but for the remainder of the article the particle diameter is 5 and 13 μm.
2. Is this focusing phenomenon caused by the T-shaped cross-sections or the aspect ratio of the lower part of the channel? It is suggested to compare it with rectangular channels with the same aspect ratio.
3. In Figure 6, what is the aspect ratio of the rectangular channel.
4. Separation is mentioned in the title, but the separation experiment was not carried out in the text, so it is suggested to remove it.
5. In Figures 9 and 10, how were the x- and y-directional net elasto-inertial force (Fnet) at different locations calculated? It is recommended to explain in the supplementary material.
6. Figure 4d, Figure 4e and Figure 4f were mentioned on page 12, but there is no d, e and f in Figure 4.
7. How to calculate the hydraulic diameter (Dh) of T-shaped channel?
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
please see attached file
Comments for author File: 
Comments.pdf
Author Response
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Author Response File: Author Response.docx
Reviewer 3 Report
Please see attached PDF file.
Comments for author File: Comments.pdf
Author Response
Thank you for your kind comments. The manuscript was intensively revised by authors and was polished through English editing service of MDPI.
Round 2
Reviewer 1 Report
The author has answered my comments satisfactorily.
Reviewer 2 Report
In the title the word "and" has to be deleted
