Investigation of stresses and normal stress differences behavior on symmetric and asymmetric polymeric fluid flow through planar gradual expansions |
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| Authors: | M Norouzi A Shahbani Zahiri M M Shahmardan H Hassanzadeh M Davoodi |
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| Institution: | 1.Department of Mechanical Engineering,Shahrood University of Technology,Shahrood,Iran;2.Department of Mechanical Engineering,University of Birjand,Birjand,Iran;3.School of Engineering,University of Liverpool,Liverpool,UK |
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| Abstract: | A numerical study of stress distribution of polymeric viscoelastic fluids passing through planar gradual expansion channels is conducted. To model the viscoelastic behavior in geometries with 1:3 expansion ratios, the exponential form of Phan-Thien Tanner model is employed as the constitutive equation. The PISO algorithm is used to solve the flow field distribution. Three different expansion angles of 30°, 45° and 60° are considered to probe the effects of the gradual expansion and its effect on the stress field distribution. The main purpose of the current study is to analysis the combined effects of the rheological properties and inertia on the normal stress distribution. To achieve this aim, different expansion angles and different ranges of Weissenberg and Reynolds numbers are studied. |
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