Review Reports

Round 1

Reviewer 1 Report

The authors focused on an interesting flow problem in the convection pipes of a gas boiler.

The analysis of the problem is focused mainly on mathematical simulations at selected parameters.

I liked the chosen method by which the authors analyzed the vibrations induced by the Carmen vortex.

I have no serious comments on the submitted manuscript. Rather, for visual evaluation, I would recommend the authors to keep the same scales of x and y axes (Fig.3 - Fig.8).

At first glance, big differences are not visible, but if the same scales were maintained, it would be more visible. The evaluation itself is already in the text itself.

A small literature review was also used for the specificity of the problem. However, this does not reduce the level of the submitted manuscript.

Author Response

Please see the attachment.

Reviewer 2 Report

This manuscript needs some minor improvement before it can be consoidered for publication

--Improve Abstract content and length. Provide more detail.

--Introduction and section 2 would benefit with the inclusion of a figure that details the overall conditions and assumptions

--provide additional design details in Figure 1. Provide additional scale information

--are all variables defined

--provide a sensitivity and error analysis

--Improve English grammar and paper structure (i.e. don't start sentences with the word "And", etc)

--provide mesh size

--discuss grid independence

--discuss operating conditions under the various results (i.e. 120%, 100%, etc)

--Discuss the figures in detail...don't lump all together (i.e Figures 3-8)

--add current (less than 5 years old) references. currently there are 0 of 14 current references.  Add additional MDPI references.

 

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Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

This revised manuscript has addressed most of the concerns of this reviewer