图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
传热学
影响因子: 1.199 5年影响因子: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

卷:
卷 51, 2020 卷 50, 2019 卷 49, 2018 卷 48, 2017 卷 47, 2016 卷 46, 2015 卷 45, 2014 卷 44, 2013 卷 43, 2012 卷 42, 2011 卷 41, 2010 卷 40, 2009 卷 39, 2008 卷 38, 2007 卷 37, 2006 卷 36, 2005 卷 35, 2004 卷 34, 2003 卷 33, 2002 卷 32, 2001 卷 31, 2000 卷 30, 1999 卷 29, 1998 卷 28, 1997

传热学

DOI: 10.1615/HeatTransRes.2012005450
pages 145-161

UNSTEADY HEAT TRANSFER IN AN ENCLOSURE WITH A TIME-PERIODIC ROTATING CYLINDER

Habibis Saleh
School of Mathematical Sciences, Universiti Kebangsaan Malaysia, 43600 UKM Bangi Selangor, Malaysia
Ishak Hashim
School of Mathematical Sciences & Solar Energy Research Institute, Faculty of Science & Technology, Universiti Kebangsaan Malaysia 43600 UKM Bangi, Selangor DE, Malaysia

ABSTRACT

Unsteady mixed convection heat transfer in a differentially heated square enclosure is studied in this article. A conductive circular with rotational speed varying periodically with time is embedded in the center of the enclosure. The governing equations are modeled in the COMSOL, with a partial differential equation (PDE) solver being based on the Galerkin finite element method (GFEM). The governing parameters considered are the rotary amplitude, −1000 ≤ AΩ ≤ 1000, the rotary frequency, 0 ≤ FΩ ≤ 300Π, the cylinder radius, 0 ≤ R ≤ 0.2, and the thermal conductivity ratio, 0.5 ≤ Kr ≤ 10. It was found that the recirculating cells exist for a positive rotary amplitude and it increases with the rotational speed. Fast rotation and a high frequency combined with a low thermal conductivity ratio was found to be most effective in enhancing the performance of the overall heat transfer rate.


Articles with similar content:

Computational study of heat and fluid flow around a rotary oscillating cylinder at a high Re number
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2018, issue
Kemal Hanjalic, Muhamed Hadziabdic, R. Mullyadzhanov, E. Palkin
FREE CONVECTION IN H-SHAPED ENCLOSURES FILLED WITH A POROUS MEDIUM SATURATED WITH NANOFLUIDS WITH MOUNTED HEATERS ON THE VERTICAL WALLS
Special Topics & Reviews in Porous Media: An International Journal, Vol.4, 2013, issue 4
Sameh Elsayed Ahmed, M. A. Y. Bakier, M. A. Mansour
NUMERICAL AND OPTIMIZATION STUDY OF MIXED CONVECTION DUE TO A ROTATING CYLINDER IN A POROUS CAVITY
Journal of Porous Media, Vol.21, 2018, issue 11
Hakan F. Öztop, Fatih Selimefendigil
NON-DARCIAN AND ANISOTROPIC EFFECTS ON THE CONJUGATE HEAT TRANSFER IN A POROUS ENCLOSURE WITH FINITE THICKNESS WALLS
Journal of Porous Media, Vol.17, 2014, issue 4
Sameh Elsayed Ahmed, Abdelraheem M. Aly
EFFECT OF PERIODICALLY ALTERNATING WALL TEMPERATURE ON NATURAL CONVECTION HEAT TRANSFER ENHANCEMENT IN A SQUARE CAVITY FILLED WITH Cu-WATER NANOFLUIDS
Heat Transfer Research, Vol.47, 2016, issue 9
Xi Meng, Enshen Long, Jun Wang, Yan Wang