Author
Talib, Nayyef Ahmed, Ertunç, Özgür
Publication Date
2019-02
Publication Place
-
The Society of Chemical Engineers
Subject
Giesekus model, Finite element simulation, Rubber compound, Capillary extrusion, Swelling, Complex fluid
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0021-9592
Record ID
e5dfe9a7-e4e2-4da2-9c4e-61f634869080
Library Location
Mechanical Engineering
Date
2019-02
Notes
Ozyegin University in Istanbul, Turkey ; University of Diyala, Iraq ; University of Diyala/College of Engineering
Sample Text
Extrudate swell is an important phenomenon occurring when high viscoelastic materials, such as rubber and rubber compounds, are extruded. In this work, the effects of relaxation time and relaxation mode on swell predictions using a nonlinear differential viscoelastic model, that is, the Giesekus model, are studied systematically for rubber extrusion in a capillary die. The corresponding 3D, steady-state finite element simulation for predictions of swelling is presented and compared with experimental data for validation. Velocity distribution, pressure drop and circulation flow in the die are analyzed and discussed through the simulation. The results of swell prediction reveal that three-relaxation mode of the Giesekus model with a wide range of relaxation times reproduce experimental data. In addition, the number of relaxation mode and relaxation time have remarkable effects on circulation flow at the die corner and some effect on other field variables.
DOI
10.1252/jcej.18we070
Cilt
52
