Numerical Analysis of Friction-Filling Performance of Friction-Type Vertical Disc Precision Seed-Metering Device Based on EDEM

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The paper investigates the different positions of particles in a square tube, the friction coefficient between particles and the side wall of the square tube, and the influence of particle radius on the pressure on the side wall of the tube through DEM and bench tests. And the influence pattern of related factors was obtained, which is of some significance to the study of friction filling seeds. The comments for the improvement of this paper are as follows:

1. Abstract: More quantitative results for your experiment need to be added.

2. Introduction: Please improve current study related to the topic of paper in the world and clearly show your contributions.

3. Fig 5 needs to be labeled with the test equipment; Fig 12 and Fig 14 are difficult to read. Chinese in Fig 17?

4. The meanings represented by "Location1, Location2, etc." in Fig 8, Fig 9, and Fig 10 need to be explained.

5. Results and Discussion: Why are the experimental factors different? Please explain the difference between radius and width diameter ratio.

6. ”3.3 Discussion”: The discussion needs to be improved based on the experimental data. (the interaction between various factors, how is your experimental results as compared to current studies, etc.)

7. Please improve the experiment to verify your results, and the experiment needs to consider the impact of vibration and other factors on the results.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

In the manuscript, the authors summarized and discussed the filling effect of seed particles was significantly improved during the process of friction filling. This study provides new insights and viewpoints for future development, verifies the correctness of numerical simulation results, and further proves that DEM simulation is an effective method to study particle motion. The manuscript title, abstract and conclusion is very clear and presented well. However, there are small problems in the article that should be minor revised before the article is accepted. I would suggest accepting it after the following minor concerns are addressed.

1. The particle radius in Figure 3 is not marked, please mark it;

2. Please annotate the bench device diagram shown in Figure 5;

3. Please add the relationship between the measured value and the filling effect of the seed-metering device in the conclusion.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

1. It is provided a theoretical analysis of the friction problem of soybean seeds filling in square tubes in the paper, but there is no effective calculation data to support it. The correctness and practicality of the theoretical analysis cannot be verified.

 2. The paper conducted EDEM simulation on the filling motion of soybean seeds in a square tube, but there is also a lack of necessary experimental verification and theoretical results comparison.

 3. There are errors in the layout of the paper, with some figures missing vertical and horizontal coordinates, and some figures without explanations for different curves.

 4. Some graphs, such as Figures 8 and 9, have too few data points to illustrate the trend of the curve. Is there a straight line between the two points?

Comments on the Quality of English Language

There are many errors in the layout of the paper, such as : many figures of non-standard  and missing information; Some parts in the paper have obvious traces of 'Chinese'.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The meanings represented by "Location1, Location2, etc." in Fig 8, Fig 9, and Fig 10 need to be explained.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

Some graphs, such as Figures 8 and 9, have too few data points to illustrate the trend of the curve. Can two data points be directly connected in a straight line to illustrate the trend of the curve? Why not a curve?

Comments on the Quality of English Language

The English description of the paper is partially inaccurate and requires further revision.

Author Response

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Author Response File: Author Response.pdf