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      Three-Dimensional, Non-Isothermal Simulations of the Effect of Speed Ratio in Partially-Filled Rubber Mixing

      1 , 1 , , 2 , *

      International Polymer Processing

      Carl Hanser Verlag

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          Abstract

          Three-dimensional, transient, non-isothermal calculations have been carried out using a commercial computational fluid dynamics (CFD) software in a two-wing rotor-equipped chamber partially-filled (75% fill factor) with rubber, to analyze the mixing efficiency for three different rotor speed ratios of 1, 1.125 and 1.5. The moving mesh technique has been used to incorporate the motion of the rotors. The Eulerian based volume of fluid (VOF) method has been used to track the interface between the two fluids, which are rubber and air. To assign the highly viscous and non-Newtonian properties of rubber, the Carreau-Yasuda model along with an exact Arrhenius formulation that accounts for the shear and temperature dependent viscosity, has been used here. Governing equations including the continuity, momentum and energy equations have been solved to characterize the flow field and various mixing parameters. Eulerian-based fields such as velocity magnitude, viscous heat generation, and average temperature and viscosity are compared between cases with different speed ratios. Dispersive and distributive mixing behaviour are assessed through a Lagrangian approach that tracks the paths of a set of massless particles. Statistical quantities such as cumulative distribution of maximum shear stress, cluster distribution index, and axial and inter-chamber particle transfer rates are calculated and presented as well. Results showed that the speed ratio of 1.5 displayed the best dispersive and distributive mixing characteristics in comparison to the other cases.

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          Most cited references 48

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          Apparent slip and viscoplasticity of concentrated suspensions

           Dilhan Kalyon (2005)
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            Effects of temperature and surface roughness on time‐dependent development of wall slip in steady torsional flow of concentrated suspensions

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              Distributive mixing in conveying elements of a ZSK-53 co-rotating twin screw extruder

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                29 April 2019
                : 34
                : 2
                : 219-230
                Affiliations
                1 Department of Mechanical Engineering, University of Akron, Akron, Ohio, USA
                2 Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
                Author notes
                [* ] Correspondence address, Mail address: Abhilash J. Chandy, Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India, E-mail: achandy@ 123456iitb.ac.in
                Article
                IPP3680
                10.3139/217.3680
                © 2019, Carl Hanser Verlag, Munich
                Page count
                References: 61, Pages: 12
                Product
                Self URI (journal page): http://www.hanser-elibrary.com/loi/ipp
                Categories
                Regular Contributed Articles

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