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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Journal of Porous Media
Импакт фактор: 1.49 5-летний Импакт фактор: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Печать: 1091-028X
ISSN Онлайн: 1934-0508

Выпуски:
Том 22, 2019 Том 21, 2018 Том 20, 2017 Том 19, 2016 Том 18, 2015 Том 17, 2014 Том 16, 2013 Том 15, 2012 Том 14, 2011 Том 13, 2010 Том 12, 2009 Том 11, 2008 Том 10, 2007 Том 9, 2006 Том 8, 2005 Том 7, 2004 Том 6, 2003 Том 5, 2002 Том 4, 2001 Том 3, 2000 Том 2, 1999 Том 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i11.10
pages 967-977

MIXED CONVECTION ON A PERMEABLE STRETCHING CYLINDER WITH PRESCRIBED SURFACE HEAT FLUX IN POROUS MEDIUM WITH HEAT GENERATION OR ABSORPTION

Sadegh Khalili
Binghamton University
Arezoo Khalili
Department of Mechanical Engineering, Saveh Branch, Islamic Azad University, Saveh, Iran
Sara Kafashian
Department of Energy System Engineering, Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
Abbas Abbassi
Department of Mechanical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave., P.O. Box 15875-4413, Tehran, Iran

Краткое описание

The steady mixed convection boundary layer flow due to a permeable stretching cylinder with prescribed heat flux in porous medium with heat generation/absorption is investigated numerically. The governing system of partial differential equations is converted into a system of ordinary differential equations using similarity transformation, which is then solved numerically by the fourth-order Runge-Kutta method with shooting technique. The influence of the governing parameters, namely the permeability, heat generation/absorption, suction/injection, Prandtl number, and Reynolds number on the flow and heat transfer characteristics are analyzed and discussed. It is found that the skin-friction coefficient and the Nusselt number at the surface increase as the Prandtl number increases. The same behavior is observed for the wall permeability parameter while the opposite behavior is observed for the heat generation parameter and Reynolds number of the cylinder. On the other hand, in the case of opposing flow with an increase in the mixed convection parameter velocity decreases whereas the temperature increases but the opposite behavior is observed in the case of assisting flow.


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