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Paper
Title

Investigation of Screw Turning and Barrel Turning Boundaries in Single Screw Extruders by OpenFOAM cfd Software

Year: 1390
COI: ICHEC07_279
Language: EnglishView: 558
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Authors

Yousef Tamsilian - Sharif University of Technology Petroleum and Chemical Engineering Department Tehran, Iran.
Amirhosein Ahmadian - Sharif University of Technology Petroleum and Chemical Engineering Department Tehran, Iran.
Ahmad Ramazani s.a - Sharif University of Technology Petroleum and Chemical Engineering Department Tehran, Iran.

Abstract:

This study presents CFD modeling of Newtonian, generalized-Newtonian and viscoelastic fluidflows in an extruder concerning screw turning (as realistic boundary) and barrel turning (as classical boundary) to compare modern extrusion modeling vs. classical extrusion modeling in which normally barrel turns.A three dimensional finite-volume scheme is used to solve momentum and fluid constitutive equations by a generated hex grid for the convective-type terms to discrete the equations and solve the set of governing equations. The simulations concern incompressible fluids obeying different constitutive equations: Newtonian fluid, generalized-Newtonian fluid with shear-thinning properties (Carreau–Yasuda model), and viscoelastic differential fluid, the Phan– Thien/Tanner model (PTT). The post-processing are done in contour and vector form based on channel depth onto the axial flow. Considering screw moving boundary in the extruder has significant effects on pressure, stress, and velocity behaviors comparing to the obtained results from the assumption of the turning barrel boundary that currently is used to model the extrusion process. Numerical results demonstrate that the pressure and velocity profiles are opposite in the two mentioned assumptions and viscoelastic properties cause effectively to change flow behavior in the spiral direction. Furthermore, the major variables of flow are influenced by Newtonian, viscoelastic and generalized-Newtonian models in volume control output.

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Paper COI Code

This Paper COI Code is ICHEC07_279. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/341031/

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Tamsilian, Yousef and Ahmadian, Amirhosein and Ramazani s.a, Ahmad,1390,Investigation of Screw Turning and Barrel Turning Boundaries in Single Screw Extruders by OpenFOAM cfd Software,07th International Congress on Chemical Engineering,Kish Island,https://civilica.com/doc/341031

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Type of center: دانشگاه دولتی
Paper count: 14,809
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