**4. Conclusions**

In this paper the analytical solution of non-Fourier heat conduction in a cylinder composed of a homogenous material with different boundary conditions: A symmetry boundary condition in the cylinder's central line and the convection in the cylinder surface (*r* = R) with ambient is investigated.

We conclude that the obtained results provide an accurate, convenient, and useful solution to the non-Fourier equation, which is usable for analyses of various engineering applications.

The key findings and conclusions from the present solution are as follows:

At small times (*t* = 0.1) up to about *r* = 0.4, the contribution of *T*1 and *T*3 dominate compared to *T*2 contributing little to the overall temperature.

At *t* = 0.5, *T*2 does not have much effect on the overall temperature and acts approximately uniformly with a constant value.

At *t* = 0.5, *T*1 and *T*3 have a downward trend, but *T*3 is dominant.

At *t* = 1, the effects of *T*1 on the overall temperature near to the center of the cylinder are decreased.

At low times, by enhancing the time, temperatures at the center of the cylinder (*r* = 0) enhance.

At big times, the temperature throughout the cylinder will continue to increase.

**Author Contributions:** The contributions of each author in preparing this paper has been clearly identified as bellow, In the writing the article all authors had contributions. The literature review was performed by R.K. and S.M.A. All equations were derived and checked by M.A. (Mohammad Akbari) The results and discussion was prepared by M.A. (Masoud Afrand) According to the reviewer comments, all of the authors prepared the revision format of the manuscript. Ultimately, final approval of the article was done by R.K., M.A. (Mohammad Akbari) and M.A. (Masoud Afrand).

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors of this article certify that they have NO affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in the manuscript entitled "Analytical Solution of Heat Conduction in a Symmetrical Cylinder Using the Solution Structure Theorem and Superposition Technique ".
