Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
An experimental investigation on performance of annular fins on a horizontal cylinder in free convection heat transfer
Date
2004-02-01
Author
Yildiz, S
Yüncü, Hafit
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
260
views
0
downloads
Cite This
Natural convection heat transfer in annular fin-arrays mounted on a horizontal cylinder was experimentally investigated. An experimental set-up was constructed to investigate heat transfer characteristics of 18 sets of annular fin-arrays mounted on a horizontal cylinder of 24.9-mm diameter in atmospheric conditions. Keeping the fin thickness fixed at 1 mm, fin diameter is varied from 35 mm to 125 mm and fin spacing is varied from 3.6 mm to 31.7 mm. The base-to-ambient temperature difference was also varied with a calibrated wattmeter ranging from 25 W to 150 W. The results have shown that the convection heat transfer rate from the fin arrays depends on fin diameter, fin spacing and base-to-ambient temperature difference. In addition, for every fin diameter, for a given base-to-ambient temperature difference, there exists an optimum value for the fin spacing for which the heat transfer rate from the fin array is maximised. Experimental results show that, for practical engineering applications, the optimum fin spacing may be taken approximately as 8 mm. A scale analysis is also performed in order to estimate order-of-magnitude of optimum fin spacing at a given fin diameter and base-to-ambient temperature difference. The correlation obtained from scale analysis is the result of limited number of experiments. This correlation may be generalised by applying the order-of-magnitude analysis developed in this work for wider range of experiments.
Subject Keywords
General Engineering
,
Condensed Matter Physics
,
Fluid Flow and Transfer Processes
URI
https://hdl.handle.net/11511/56096
Journal
HEAT AND MASS TRANSFER
DOI
https://doi.org/10.1007/s00231-002-0404-x
Collections
Graduate School of Natural and Applied Sciences, Article
Suggestions
OpenMETU
Core
Experimental Thermal Performance Characterization of Flat Grooved Heat Pipes
Alijani, Hossein; ÇETİN, BARBAROS; Akkus, Yigit; Dursunkaya, Zafer (Informa UK Limited, 2019-06-15)
The thermal characterization of aluminum flat grooved heat pipes is performed experimentally for different groove dimensions. Three heat pipes with groove widths of 0.2 mm, 0.4 mm, and 1.5 mm are used in the experiments. The effect of the amount of the working fluid is extensively studied for each groove width. The results reveal that, although all three succeed in dissipating the heat input through the phase change of the working fluid by continuous evaporation and condensation, the effectiveness of the he...
A theory of dropwise condensation at large subcooling including the effect of the sweeping
Yamali, C; Merte, H (Springer Science and Business Media LLC, 2002-02-01)
The effect of sweeping by the departing droplets on the heat transfer coefficient in dropwise condensation is studied analytically here. Using basic principles, an analytical model for dropwise condensation is devised, which takes into account the elementary processes that make up the dropwise condensation cycle. The analysis is divided into two parts: in the first part, the heat transfer as a result of nucleation and coalescing of the droplets is considered. In the second part, the effect of sweeping is in...
Heat transfer effects on the stability of low speed plane Couette-Poiseuille flow
Oezgen, Serkan; Dursunkaya, Zafer; Ebrinc, Ali Asian (Springer Science and Business Media LLC, 2007-10-01)
The stability problem of low-speed plane Couette-Poiseuille flow of air under heat transfer effects is solved numerically using the linear stability theory. Stability equations obtained from two-dimensional equations of motion and their boundary conditions result in an eigenvalue problem that is solved using an efficient shoot-search technique. Variable fluid properties are accounted for both in the basic flow and the perturbation (stability) equations. A parametric study is performed in order to assess the...
Optimization of Vortex Promoter Parameters to Enhance Heat Transfer Rate in Electronic Equipment
Ayli, Ece; Bayer, Özgür (ASME International, 2020-04-01)
In this paper, optimization of the location and the geometry of a vortex promoter located above in a finned surface in a channel with eight heat sources is investigated for a Reynolds number of 12,500 < Re < 27,700. Heat transfer rates and the corresponding Nusselt number distributions are studied both experimentally and numerically using different vortex promoter geometries (square, circular, and triangular) in different locations to illustrate the effect of vortex promoter on the fluid flow. Optimization ...
An experimental investigation on performance of fins on a horizontal base in free convection heat transfer
Guvenc, A; Yüncü, Hafit (2001-07-01)
Natural convection heat transfer in rectangular fin-arrays mounted on a vertical base was investigated experimentally. An experimental set-up was constructed and calibrated to test 15 different fin configurations. Fin length and fin thickness were kept fixed at 100 and 3 mm respectively, while fin spacing was varied from 4.5 to 58.75 mm and fin height was varied from 5 to 25 mm. Base-to-ambient temperature difference was also varied through a calibrated wattmeter ranging from 10 to 50 W. The results showed ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Yildiz and H. Yüncü, “An experimental investigation on performance of annular fins on a horizontal cylinder in free convection heat transfer,”
HEAT AND MASS TRANSFER
, pp. 239–251, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56096.