Comparative study of rhomboidal mixing sections using the boundary element method |
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| Affiliation: | 1. Institute of General and Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, Serbia;2. Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences “Vinča”, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;3. Institute of Food Technology Novi Sad, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia;4. Faculty of Technology, University of Novi Sad, Bulevar Cara Lazara 1, 21000 Novi Sad, Serbia;1. State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Chongqing Research Institute of Shanghai Jiao Tong University, Chongqing 401135, PR China;3. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;4. Shanghai Key Lab of Digital Manufacture for Thin-Walled Structures, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;5. Engineering Research Center of Gas Turbine and Civil Aero Engine, Ministry of Education, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China;1. Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agricultural Product Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, People’s Republic of China;2. Food Division, Brabender GmbH & Co. KG, 51–55 Kulturstrasse, 47055 Duisburg, Germany;1. Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA;2. CD-adapco, Nordostpark 3-5, Nuremberg 90411, Germany;3. Process Systems Enterprise Ltd., 26-28 Hammersmith Grove, London W6 7HA, UK;4. CD-adapco, 11000 Richmond Ave, Houston, TX 77042, USA;5. CD-adapco, California Office, CA, USA;1. Jiangxi Province Key Laboratory of Polymer Preparation and Processing, Shangrao Normal University, Shangrao 334001, PR China;2. School of Information Engineering, Nanchang University, Nanchang 330031, PR China;3. College of Mechanical & Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China;1. Department of Civil and Mechanical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark;2. Department of Mechanical and Production Engineering, Aarhus University, Aarhus, Denmark;3. Manufacturing Science Division, Oak Ridge National Laboratory, TN, 37932, USA |
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| Abstract: | The rhomboidal mixing section is becoming very popular in polymer extrusion to provide distributive mixing. Currently, several different designs are used but the details of the flow behavior and mixing efficiency is not well understood. This information is needed to be able to design and find the most efficient rhomboid geometry. In this research, nine different geometries with various pitches (helix of rhomboids) are analyzed using a three-dimensional boundary element method (BEM). The geometries are compared according to mixing efficiency, pressure and energy consumption. The investigation led to the conclusion that the most effective distributive mixing sections were the ones with neutral rhomboids (pineapple mixer). However, the neutral rhomboidal mixing section consumes the most pressure in the extruder. |
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