بررسي عددي انتقال گرماي جابه جايي سيال ويسكوالاستيك در كانال خميده داراي مقطع مربعي

A Numerical Investigation of Conductive Heat Transfer of Viscoelastic Fluid in a Curved Square Duct

Abstract! In this paper, fully developed flow and heat transfer of viscoelastic fluid in a curved pipe with square cross section is investigated. To that end, Criminale-Eriksen-Filbey (CEF) constitutive equation is used as viscoelastic model and heat transfer is AD jlol^U *** jULSb- ** " (^A^ jlLwoj J ojU-j. J^ JL- , ^Jd^. ji JJ studied at constant heat flux and in constant temperature conditions. Here, the governing equations are discreted using finite difference method. Also, staggered grids are used as mesh, and Marker and Cell method is applied for allocating the flow parameters on staggered grids. Here, the effect of the stress fields* work of visoelastic fluid and Brinkman number on convective heat transfer inside a curved duct is studied for the first time. Overall, the inverse effect of the first and second normal stress differences on secondary flows intensity and heat transfer is the main result of the current research.