The author in his Introduction gives the reasons why one should consider the two-dimensional analysis and non-insulated tip. Briefly, he states the “mathematics in the one-dimensional solution are not difficult, because of large heat transfer coefficients, the tip should no be considered insulated, and the two-dimensional solution is more difficult.” However, the following discussion will show that the above are rather superficial statements without any scientific basis. The dimensionless variables employed by the author are not appropriate, this leads to n confusing results.
In concluding, we should point out that the author’s comments such as “large heat transfer coefficients, thin and thick fins,” should be disregarded because all these quantities are introduced through the proper non-dimensional parameters. Also, the author’s last statement “the major difference is that the one-dimensional solution is less restrictive” whatever that means should be ignored.
Today fin designers are using more sophisticated programs to design optimum or nearly optimum fins, taking into account variable thermal parameters. Therefore this paper does not offer any help due to an inappropriate set of dimensionless variables and the misleading statement “Use Fin” that appears in the Figs. 2 and 3.
Prof. Emeritus City University of New York and Assoc. Editor Heat Transfer Engineering. E-mail: email@example.com