Inscrição na biblioteca: Guest
Computational Thermal Sciences: An International Journal

Publicou 6 edições por ano

ISSN Imprimir: 1940-2503

ISSN On-line: 1940-2554

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.5 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00017 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.279 SNIP: 0.544 CiteScore™:: 2.5 H-Index: 22

Indexed in

NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER OF NANOFLUIDS IN PARTIALLY HEATED SEMI-ANNULI

Volume 6, Edição 3, 2014, pp. 199-217
DOI: 10.1615/.2014010754
Get accessGet access

RESUMO

This study addresses a numerical analysis of heat transfer and fluid flow in a partially heated horizontal annulus filled with nanofluids. The conservation equations in cylindrical coordinates are solved using an in-house FORTRAN code based on the finite-volume method coupled with multigrid acceleration. A heat source owing constant temperature is placed along the outer cylinder of the annular region. The temperature of the inner cylinder is lower than that of the outer cylinder, while the remaining parts are kept insulated. The numerical investigation is carried out for a Rayleigh number in the range of 102 ≤ Ra ≤ 106 and for solid volume fraction of nanoparticles limited to 0 ≤ φ ≤ 0.08. Four nanoparticles (Au, Cu, CuO, Al2O3) and three base fluids (water, ethylene glycol, oil) are selected to examine potential heat transfer enhancement in the annulus. In order to investigate the effects of the size and/or location of the heat source on the fluid flow and heat transfer, different configurations are considered. Results are presented in terms of streamline and isotherms plots, as well as the local and average Nusselt numbers at the heat source surface under different conditions. It is found that the average Nusselt number exhibits an increasing trend as dual functions of the Rayleigh number and the solid volume fraction of the nanoparticles. Furthermore, the results reveal that one type of nanoparticle or base fluid is a key factor for improving the heat transfer. In particular, the highest values of enhancement are obtained when using Au nanoparticles or an oil base fluid. Moreover, it is observed that the size, γ, and location, θp, of the heat source significantly affect the resulting convective flow. An optimum size of the heat source is manifested in which the average Nusselt number attains a minimum for a given Rayleigh number. Reliable correlations formulae expressing the average Nusselt number in terms of Ra, φ, γ, and θp are established.

CITADO POR
  1. Bezi Sonia, Souayeh Basma, Ben-Cheikh Nader, Ben-Beya Brahim, Numerical simulation of entropy generation due to unsteady natural convection in a semi-annular enclosure filled with nanofluid, International Journal of Heat and Mass Transfer, 124, 2018. Crossref

  2. Medebber Mohamed A., Retiel Noureddine, Numerical Study of Natural Convection in a Vertical Cylindrical Partially Annular, Mechanics and Mechanical Engineering, 22, 1, 2018. Crossref

Próximos artigos

Positivity Preserving Analysis of Central Schemes for Compressible Euler Equations Souren Misra, Alok Patra, Santosh Kumar Panda 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
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa Políticas de preços e assinaturas Begell House Contato Language English 中文 Русский Português German French Spain