Analysis of Particle-Resolved CFD Results for Dispersion in Packed Beds
Round 1
Reviewer 1 Report
Comments on the submitted manuscript: Analysis of particle-resolved CFD results for dispersion in packed beds
This is an excellent study. The authors studied the dispersion of an inert tracer flowing through a packed bed of particles using Computational Fluid Dynamics simulations. The problem, objectives, and methods are well described. The only comment I have is that there should be more detail on the CFD: computational domain, grid (both with schematics) and solver. It will be interesting to see the refinement regions around your particles in relation to the bulk fluid zone, as well as grid independence. All these basics of a CFD based paper are still important. Based on these, the reviewer suggests a minor revision and the paper may be accepted after the authors make the recommended changes.
Author Response
Thank you for reviewing our paper. Detailed responses can be found in the attached pdf.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This manuscript is very interesting and informative. When reading the text, I did not find the opportunity to make a comment. I am sure that the manuscript can be published as it is.
Author Response
Thank you for reviewing our paper. Detailed responses can be found in the attached pdf.
Author Response File: Author Response.pdf
Reviewer 3 Report
In this paper, the authors investigated the characterization of dispersion in a packed bed with either spherical or non-spherical particles using particle-resolved computational fluid dynamics method. The structure of the paper is clearly and sound. Detailed information has been provided in regarding the model development. Results are clearly presented with comprehensive discussion. Overall, the paper is thoughtfully written. Therefore, I agree to accept after minor revision. Please see the comments below.
1. Is there a specific reason to choose 9e-3 m as particle shaft for the spherocylindrical particles?
2. Line 78-79, when solving the scalar transport equation for the tracer species, how did the authors determine the diffusion coefficient for the tracer species? Did they assume homogeneous diffusion?
3. In Eq. (3), what does <tn> represent here? Please explain.
4. Line 122, which is Eq. (2.3)? Please clarify.
5. Line 172, is <ε> included in Eq. (14)?
6. Similar to comment 4, in caption of Figure 4, please indicate which equation is eqn (2.3).
7. As mentioned in the Discussion and Conclusions section, there are several limitations for current article. What are the future works that the authors plan to continue working on?
8. There are a few typos in the paper, for example, in line 175, "depend" should be "depends". Please go through the paper and revise all the typos.
Author Response
Thank you for reviewing our paper. Detailed responses can be found in the attached pdf.
Author Response File: Author Response.pdf
