Library Subscription: Guest

EFFECT OF PRANDTL NUMBER ON FREE CONVECTION IN NEWTONIAN AND POWER-LAW FLUIDS FROM A CYLINDER ADJACENT TO AN ADIABATIC WALL

Volume 8, Issue 1, 2016, pp. 73-98
DOI: 10.1615/ComputThermalScien.2016015847
Get accessGet access

ABSTRACT

Steady two-dimensional natural convection heat transfer from a horizontal cylinder situated above or beneath an adiabatic wall is numerically studied. The governing differential equations have been solved over wide ranges of dimensionless parameters, namely, Grashof number (10 ≤ Gr ≤ 104), Prandtl number (5 ≤ Pr ≤ 100) and power-law index (0.2 ≤ n ≤ 1), for a range of gaps between the cylinder and the adiabatic wall, ΙH/DΙ = 0.05, 0.2, 0.5, 0.9, 1.1, 1.5, 3, and 5. Limited results were also obtained for large values of (H/D) ≥ 3000 to approach the unconfined cylinder limit. Detailed discussion of the momentum and heat transfer phenomena is presented in terms of the streamlines, velocity field, isotherms, and the Nusselt number. The effect of the Prandtl number is more pronounced when the cylinder is close to the wall and this effect gradually diminishes as the gap increases. The average Nusselt number shows a positive dependence on the values of the Grashof and Prandtl numbers. With reference to the value of the Nusselt number for an unconfined cylinder, the presence of the adiabatic wall, above or below the cylinder, has an adverse influence on heat transfer. Indeed, the influence of the wall persists up to large values of the gap between the wall and the cylinder. The present results on the average Nusselt number have been reconciled in the form of a single correlation for the both top and bottom confinements.

Forthcoming Articles

A lattice Boltzmann study of nano-magneto-hydrodynamic flow with heat transfer and entropy generation over a porous backward facing-step channel Hassane NAJI, Hammouda Sihem, Hacen Dhahri A Commemorative Volume in Memory of Darrell Pepper David Carrington, Yogesh Jaluria, Akshai Runchal In Memoriam: Professor Darrell W. Pepper – A Tribute to an Exceptional Engineering Educator and Researcher Akshai K. Runchal, David Carrington, SA Sherif, Wilson K. S. Chiu, Jon P. Longtin, Francine Battaglia, Yongxin Tao, Yogesh Jaluria, Michael W. Plesniak, James F. Klausner, Vish Prasad, Alain J. Kassab, John R. Lloyd, Yelena Shafeyeva, Wayne Strasser, Lorenzo Cremaschi, Tom Shih, Tarek Abdel-Salam, Ryoichi S. Amano, Ashwani K. Gupta, Nesrin Ozalp, Ting Wang, Kevin R. Anderson, Suresh Aggarwal, Sumanta Acharya, Farzad Mashayek, Efstathios E. Michaelides, Bhupendra Khandelwal, Xiuling Wang, Shima Hajimirza, Kevin Dowding, Sandip Mazumder, Eduardo Divo, Rod Douglass, Roy E. Hogan, Glen Hansen, Steven Beale, Perumal Nithiarasu, Surya Pratap Vanka, Renato M. Cotta, John A. Reizes, Victoria Timchenko, Ashoke De, Keith A Woodbury, John Tencer, Aaron P. Wemhoff, G.F. ‘Jerry’ Jones, Leitao Chen, Timothy S. Fisher, Sandra K. S. Boetcher, Patrick H. Oosthuizen, Hamidreza Najafi, Brent W. Webb, Satwindar S. Sadhal, Amanie Abdelmessih Modeling of Two-Phase Gas-Liquid Slug Flows in Microchannels Ayyoub Mehdizadeh Momen, SA Sherif, William E. Lear Performance of two dimensional planar curved micronozzle used for gas separation Manu K Sukesan, Shine SR A Localized Meshless Method for Transient Heat Conduction with Applications Kyle Beggs, Eduardo Divo, Alain J. Kassab Non-nested Multilevel Acceleration of Meshless Solution of Heat Conduction in Complex Domains Anand Radhakrishnan, Michael Xu, Shantanu Shahane, Surya P Vanka Assessing the Viability of High-Capacity Photovoltaic Power Plants in Diverse Climatic Zones : A Technical, Economic, and Environmental Analysis Kadir Özbek, Kadir Gelis, Ömer Özyurt MACHINE LEARNING LOCAL WALL STEAM CONDENSATION MODEL IN PRESENCE OF NON-CONDENSABLE FROM TUBE DATA Pavan Sharma LES of Humid Air Natural Convection in Cavity with Conducting Walls Hadi Ahmadi moghaddam, Svetlana Tkachenko, John Reizes, Guan Heng Yeoh, Victoria Timchenko
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections Prices and Subscription Policies Begell House Contact Us Language English 中文 Русский Português German French Spain