Heat transfer enhancement in annular fins using functionally graded material

2013 ◽  
Vol 42 (7) ◽  
pp. 603-617 ◽  
Author(s):  
Rahim Hassanzadeh ◽  
Hakan Pekel
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Functionally Graded Material ◽  
Functionally Graded ◽  
Transfer Enhancement ◽  
Graded Material ◽  
Annular Fins

scholarly journals Nonlinear Transient Thermal Modeling and Analysis of a Convective-Radiative Fin with Functionally Graded Material in a Magnetic Environment

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
M. G. Sobamowo ◽  
G. A. Oguntala ◽  
A. A. Yinusa
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Thermal Performance ◽  
Functionally Graded Material ◽  
Analytical Solutions ◽  
Functionally Graded ◽  
Approximate Analytical Solutions ◽  
Graded Material ◽  
Nonlinear Transient ◽  
Transient Thermal

Nonlinear transient thermal analysis of a convective-radiative fin with functionally graded materials (FGMs) under the influence of magnetic field is presented in this study. The developed nonlinear thermal models of linear, quadratic, and exponential variation of thermal conductivity are solved approximately and analytically using the differential transformation method (DTM). In order to verify the accuracies of the nonlinear solutions, exact analytical solutions are also developed with the aids of Bessel, Legendre, and modified Bessel functions. Good agreements are established between the exact and the approximate analytical solutions. In the parametric studies, effects of heat enhancement capacity of fin with functionally graded material as compared to fin with homogeneous material are investigated. Also, influence of the Lorentz force and radiative heat transfer on the thermal performance of the fin are analyzed. From the results, it is shown that increase in radiative and magnetic field parameters as well as the in-homogeneity index improve the thermal performance of the fin. Also, the transient responses reveal that the FGM fin with quadratic-law and exponential-law function shows the slowest and fasted thermal responses, respectively. This study will provide a very good platform for the design and optimization of an improved heat transfer enhancement in thermal systems, where the surrounding fluid is influenced by a magnetic field.

Heat Transfer Enhancement in Spirally Corrugated Tube

2014 ◽  
Vol 7 (6) ◽  
pp. 970 ◽  
Author(s):  
Tholudin Mat Lazim ◽  
Zaid Sattar Kareem ◽  
M. N. Mohd Jaafar ◽  
Shahrir Abdullah ◽  
Ammar F. Abdulwahid
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Transfer Enhancement ◽  
Corrugated Tube
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