Simulation of the High Viscous Flow in Twin-Screw Extruder Using a Particle Method

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  • 粒子法を用いた二軸押出機内の高粘性流れのシミュレーション

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<p>A twin-screw extruder is a widely-used device for manufacturing polymer materials. For the optimization of extruder design and operation condition, numerical simulations of flows in twin-screw extruders have been desired. In this study, MPS (moving particle semi-implicit) method is used to simulate highly viscous incompressible flows with free surfaces in a twin-screw extruder. To handle complicated geometric shapes of the screw, recently-developed integral wall model is adopted for the treatment of solid wall boundaries. As a result, fluid flows driven by the rotation of screws were obtained. Therein, a flow through a small gap between screws and a cylinder was reproduced.</p>

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