Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110

Выпуски:
Том 46, 2019 Том 45, 2018 Том 44, 2017 Том 43, 2016 Том 42, 2015 Том 41, 2014 Том 40, 2013 Том 39, 2012 Том 38, 2011 Том 37, 2010 Том 36, 2009 Том 35, 2008 Том 34, 2007 Том 33, 2006 Том 32, 2005 Том 31, 2004 Том 30, 2003 Том 29, 2002 Том 28, 2001 Том 27, 2000 Том 26, 1999 Том 25, 1998 Том 24, 1997 Том 23, 1996 Том 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.2018019672
pages 75-91

INFLUENCE OF TEMPERATURE-DEPENDENT CONDUCTIVITY ON CONVECTIVE HEAT TRANSFER IN A VERTICAL DUCT

Jawali C. Umavathi
Department of Mathematics, Gulbarga University, Kalaburgi-585106, Karnataka, India

Краткое описание

An analysis has been carried out to study the flow and heat characteristics of a Newtonian fluid in a vertical rectangular duct. One of the vertical walls of the duct is cooled to a constant temperature, while the other wall is heated to constant but different temperature. The thermal conductivity is assumed to vary as a linear function of temperature. The basic equations governing the flow and heat transfer are highly non-linear coupled partial differential equations. Numerical solution of the problem is obtained by using finite difference method of second-order accuracy. The effects of various physical parameters such as conductivity parameter BK (-1 ≤ BK ≤ 1.0), Grashof number Gr (1.0 ≤ Gr ≤ 25.0), Brinkman number Br (0.01 ≤ Br ≤ 2.0), and aspect ratio A(0.5 ≤ A ≤ 2.0), which determine the velocity and temperature contours, are shown pictorially. Results are also presented for the skin friction, volumetric flow rate, and heat transfer rate for representative values of different key parameters. It is found that the intensity of the velocity contours is dense in the lower half region of the duct for negative values of conductivity variation parameter and in the upper region of the duct for positive values of conductivity variation parameter. The 3D contours on temperature are concave for negative values of BK and convex for positive values of BK.


Articles with similar content:

EFFECT OF THE ASPECT RATIO ON NATURAL CONVECTION IN A POROUS CAVITY WITH A SINUSOIDAL ACTIVE THERMAL WALL
Heat Transfer Research, Vol.47, 2016, issue 3
Gang Wang, Feng Wu, Wenjing Zhou, Xiaoxun Ma
Natural Convection from a Horizontal Annulus Filled with Porous Medium of Variable Permeability
Journal of Porous Media, Vol.12, 2009, issue 7
Taha K. Aldoss
NUMERICAL INVESTIGATION OF CONJUGATE HEAT TRANSFER FROM LAMINAR WALL JET FLOW OVER A SHALLOW CAVITY
Heat Transfer Research, Vol.49, 2018, issue 12
Maheandera Prabu Paulraj, Dawid Taler, Jan Taler, Pawel Oclon, Andrea Vallati, Rajesh Kanna Parthasarathy
FREE CONVECTION FLOW IN A DUCT FILLED WITH NANOFLUID AND SATURATED WITH POROUS MEDIUM: VARIABLE PROPERTIES
Journal of Porous Media, Vol.21, 2018, issue 1
Maurizio Sasso, J. C. Umavathi
ANALYTICAL STUDY OF FORCED CONVECTION IN A CHANNEL PARTIALLY FILLED WITH POROUS MATERIAL WITH EFFECT OF MAGNETIC FIELD: CONSTANT WALL HEAT FLUX
Special Topics & Reviews in Porous Media: An International Journal, Vol.9, 2018, issue 3
J. Sharath Kumar Reddy, D. Bhargavi