Effects of Gaussian surface roughness on different aspects of thermal performance of conical microfins are investigated. A new analytical model is developed, applying the Adomian decomposition method. Convergence of the Adomian solution to the exact solution is shown, by increasing the number of computed decomposition terms. In addition, to verify the present solution, the obtained results are compared with the analytical results of Bahrami et al. (2007, “Role of Random Roughness on Thermal Performance of Microfins,” J. Thermophys. Heat Transfer, 21(1), pp. 153–157) for the uniform cross-section microfin. Surface roughness effects on temperature distribution, base heat flux at different Nusselt numbers, and thermal resistance of the microfin are investigated. It is observed that the thermal resistance of the smooth microfin is higher than the rough one and by increasing the roughness, the thermal resistance experiences further reduction.
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Analytical Investigation of Gaussian Roughness Effects on the Thermal Performance of Conical Microfins
A. Ayoobi,
A. Ayoobi
B.Sc. Student
e-mail: ahmadreza.ayoobi@yahoo.com
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M. Ramezanizadeh
M. Ramezanizadeh
1
Assistant Professor
e-mail: Ramezanizadeh@gmail.com
Aerospace Engineering Department,
Shahid Sattari Aeronautical
Aerospace Engineering Department,
Shahid Sattari Aeronautical
University of Science and Technology
,Tehran, I.R.
Iran
1Corresponding author.
Search for other works by this author on:
A. Ayoobi
B.Sc. Student
e-mail: ahmadreza.ayoobi@yahoo.com
M. Ramezanizadeh
Assistant Professor
e-mail: Ramezanizadeh@gmail.com
Aerospace Engineering Department,
Shahid Sattari Aeronautical
Aerospace Engineering Department,
Shahid Sattari Aeronautical
University of Science and Technology
,Tehran, I.R.
Iran
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Heat Transfer. Manuscript received July 27, 2011; final manuscript received September 22, 2012; published online February 8, 2013. Assoc. Editor: Phillip M. Ligrani.
J. Heat Transfer. Mar 2013, 135(3): 031901 (6 pages)
Published Online: February 8, 2013
Article history
Received:
July 27, 2011
Revision Received:
September 22, 2012
Citation
Ayoobi, A., and Ramezanizadeh, M. (February 8, 2013). "Analytical Investigation of Gaussian Roughness Effects on the Thermal Performance of Conical Microfins." ASME. J. Heat Transfer. March 2013; 135(3): 031901. https://doi.org/10.1115/1.4007854
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