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Heat Transfer in Inclined Enclosure of Silica Aerogel/Glass Fiber Composite Material

by Manal H. Saleh, Amina H. Dhaef
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 117 - Number 8
Year of Publication: 2015
Authors: Manal H. Saleh, Amina H. Dhaef
10.5120/20572-2969

Manal H. Saleh, Amina H. Dhaef . Heat Transfer in Inclined Enclosure of Silica Aerogel/Glass Fiber Composite Material. International Journal of Computer Applications. 117, 8 ( May 2015), 5-12. DOI=10.5120/20572-2969

@article{ 10.5120/20572-2969,
author = { Manal H. Saleh, Amina H. Dhaef },
title = { Heat Transfer in Inclined Enclosure of Silica Aerogel/Glass Fiber Composite Material },
journal = { International Journal of Computer Applications },
issue_date = { May 2015 },
volume = { 117 },
number = { 8 },
month = { May },
year = { 2015 },
issn = { 0975-8887 },
pages = { 5-12 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume117/number8/20572-2969/ },
doi = { 10.5120/20572-2969 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:58:46.640021+05:30
%A Manal H. Saleh
%A Amina H. Dhaef
%T Heat Transfer in Inclined Enclosure of Silica Aerogel/Glass Fiber Composite Material
%J International Journal of Computer Applications
%@ 0975-8887
%V 117
%N 8
%P 5-12
%D 2015
%I Foundation of Computer Science (FCS), NY, USA
Abstract

An investigation is performed for natural convection of air in a three dimensional inclined annulus enclosure. The annulus material is made of silica aerogel/glass fiber composite materials. The annulus enclosure is filled with silica sand between two inclined concentric cylinders with fins attached to the inner cylinder. Constant walls temperature boundary conditions are considered under steady state condition. The parameters affected on the system are modified Rayleigh number (10 ?Ra*? 500) and the annulus inclination angle ? (0o, 30o, 45o, 60o and 90o). The effect of fibres filler in composite material is investigated and two values of effective thermal conductivity are performed: the minimum and the maximum values considering the fiber alignment effect. The results showed insignificant effect of the inclination angle on the average Nusselt number for the low values of Ra*. The average Nu number increases with an increase in modified Rayleigh number and decrease with the increase of ? for high values of Ra*. The deviation between the average Nu for the maximization and minimization of the thermal conductivity is equal to 2. 26% for ?=90o (horizontal annulus) and 0. 46% for ?=0o (vertical annulus). A correlation for the average Nusselt number in terms of Ra* and ?, has been developed for the outer cold cylinder and for the two cases of maximization and minimization of thermal conductivity.

References
  1. Hubert Jopek and Tomasz Strek, 2011, Optimization of the effective thermal conductivity of a composite, Convection and Conduction Heat Transfer, Poznan University of Technology, Institute Of Applied Mechanics Poland, 17, October, 197-214.
  2. Gaosheng Wei, Yusong Liu, Xinxin Zhang, Fan Yu, Xiaoze Du, 2011, Thermal conductivities study on silica aerogel and its composite insulation Materials, International Journal of Heat and Mass Transfer 54, 2355–2366.
  3. Bo Yuan, Shuqiang Ding, Dongdong Wang, Gang Wang, Hongxia Li, 2012, Heat insulation properties of silica aerogel/glass fiber composites fabricated by press forming, Materials Letters 75, 204–206.
  4. Jun-Jie Zhao, Yuan-Yuan Duan, Xiao-Dong Wang, Bu-Xuan Wang, 2012, Radiative properties and heat transfer characteristics of fiber-loaded silica aerogel composites for thermal insulation, International Journal of Heat and Mass Transfer 55, 5196–5204
  5. Tao Xie, Ya-Ling He, Zi-Jun Hub, 2013, Theoretical study on thermal conductivities of silica aerogel composite insulating material, International Journal of Heat and Mass Transfer 58, 540–552
  6. Gaosheng Wei, Yusong Liu, Xinxin Zhang, Xiaoze Du, 2013, Radiative heat transfer study on silica aerogel and its composite insulation materials, Journal of Non-Crystalline Solids 362, 231–236.
  7. Nield D. A. and Bejan A. , "Convection in Porous Media", Springer-Verlag, New York, 1999.
  8. Fukuda K. , Takata Y. , Hasegawa S. , Shimomura H. and Sanokawa K. , 1980, Three – Dimensional Natural Convection in a Porous Medium Between Concentric Inclined Cylinders, Proc. 19th Natl Heat Transfer Conf. , Vol. HTD –8, 97 – 103.
  9. Wang Bu – Xuan and Zhang Xing, 1990, Natural Convection in Liquid Saturated Porous Media Between Concentric Inclined Cylinders, Int. J. Heat and Mass Transfer Vol. 33. No 5, 827-833.
  10. Ramón L. F. and Sergio G. M. , 2007, Three Dimensional Natural Convection in Finned Cubical Enclosure, Int. J. of Heat and Fluid Flow. Vol. 28,289-298.
  11. Aziz K. and Hellums J. D. , 1967, Numerical Solution of the Three Dimensional Equations of Motion for Laminar Natural Convection, The Physics of Fluids, V0l. 10, No. 2, 314 – 324.
Index Terms

Computer Science
Information Sciences

Keywords

Natural convection inclined annulus laminar flow silica sand silica aerogel/glass fiber.

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