Numerical Simulation of the Flow Field in the Mixing Section of a Screw Extruder by the Lattice Gas Automata Method.

Horiguchi, Hiro; Takahashi, Koji; Yokota, Toshiyuki

doi:10.1252/jcej.36.110

Cited by 5 publications

(17 citation statements)

References 6 publications

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“…2(b). Both figures show the same general features as Yao et al (1996Yao et al ( , 1997 and Horiguchi et al (2003), however the results here do not show a small circulation at the bottom corners. Fig.…”

Section: Resultssupporting

confidence: 66%

“…Despite the success of the LGM (Biggs and Humby, 1998;Rivet and Boon, 2001), there are a number of difficulties in applying the LGM and this has lead to the development of the LBM. Below a number of these problems and their solution in the LBM are briefly considered, with particular attention to the simulations presented here and the work of Horiguchi et al (2003) (HTY).…”

Section: Numerical Modelmentioning

confidence: 99%

“…Yao et al (1996Yao et al ( , 1997 performed simulations using the finite difference method (FDM) which were found to compare favourably to a visualization experiment involving the flow of high-viscosity corn syrup in a rectangular cavity with a moving top boundary. Further work was performed by Horiguchi et al (2003) using the lattice gas method (LGM). Qualitatively the FDM and LGM determined the same oval-shaped flow pattern as was observed in the visualisation experiment.…”

Section: Introductionmentioning

confidence: 99%

“…The simulations differed in that small circulation was observed in the bottom left and right corners of the LGM simulations; whereas no circulation is evident at the bottom left-hand corner in the FDM results. Horiguchi et al (2003) also considered a quantitative comparison with theory. This indicated that the LGM produced a more accurate representation of the flow field compared to the FDM, however there was still a discrepancy between the LGM simulation and the theoretical expression for the velocity.…”

Section: Introductionmentioning

confidence: 99%

“…In this study a mixing section without pins was selected and the twodimensional cross-section component considered to enable the result to be compared with alternative numerical, experimental and analytic results. (Yao et al, 1997;Horiguchi et al, 2003;McKelvey, 1962).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical simulation of the flow field in the mixing section of a screw extruder by the lattice Boltzmann model

Buick

Cosgrove

2006

Chemical Engineering Science

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The single-screw extruder is commonly used in polymer processing where the performance of the mixing section is significant in determining the quality of the final product. It is therefore of great interest to simulate the flow field in a single-screw extruder. In this paper the simulation is performed using the lattice Botlzmann model giving a fast and efficient numerical technique. The solution is compared to a finite difference and lattice gas simulation and found to give more accurate results. ᭧

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Section: Resultssupporting

confidence: 66%

Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical simulation of the flow field in the mixing section of a screw extruder by the lattice Boltzmann model

Buick

Cosgrove

2006

Chemical Engineering Science

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Lattice Boltzmann simulation of power-law fluid flow in the mixing section of a single-screw extruder

Buick

2009

Chemical Engineering Science

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Simulation of High-Viscosity Generalized Newtonian Fluid Flows in the Mixing Section of a Screw Extruder Using the Lattice Boltzmann Model

Liu,

Meng,

Zhang

et al. 2023

ACS Omega

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The mixing quality of polymer melts in the mixing section of a single-screw extruder and an injection molding machine has considerable effects on the properties of the molded products. Therefore, the study of the flow field of polymer melts in the mixing section is of great importance. The lattice Boltzmann method (LBM) exhibits unique advantages in simulating non-Newtonian fluids. Many researchers have used LBM to study the flow of medium- and low-viscosity fluids. In their studies, the Reynolds number of fluid flows is generally moderate. However, polymer melts are typical high-viscosity fluids, and their flow Reynolds number is generally very small. The single-relaxation-time lattice Boltzmann method (SRT–LBM) has been used previously to study the flow field of power law fluids in the mixing section. Herein, the flow field of high-viscosity generalized Newtonian fluids in the mixing section of a single-screw extruder is studied using SRT–LBM, the two-relaxation-time lattice Boltzmann method (TRT–LBM), and the multiple-relaxation-time lattice Boltzmann method (MRT–LBM). Through comparison, TRT–LBM has been found to exhibit obvious advantages regarding stability, calculation accuracy, calculation efficiency, and selection of simulation parameters. The TRT–LBM is more suitable for studying high-viscosity generalized Newtonian fluids than SRT–LBM and MRT–LBM. SRT–LBM has low computational efficiency when simulating high-viscosity generalized Newtonian fluids, and instability is easily caused when the fluid has a yield stress. For MRT–LBM, only by studying the relaxation parameters can its advantages be fully utilized. However, optimizing the accuracy and stability of the MRT–LBM via parameter research and linear stability analysis is difficult. For non-Newtonian fluids, it is difficult to optimize the relaxation parameters to make the MRT–LBM more stable and accurate than the TRT–LBM. It is difficult for the MRT–LBM to realize its potential when simulating high-viscosity generalized Newtonian fluids. In addition, we studied the flow pattern in the cross section of the screw channel and compared it to the results reported in previous studies.

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Numerical Simulation of the Flow Field in the Mixing Section of a Screw Extruder by the Lattice Gas Automata Method.

Cited by 5 publications

References 6 publications

Numerical simulation of the flow field in the mixing section of a screw extruder by the lattice Boltzmann model

Numerical simulation of the flow field in the mixing section of a screw extruder by the lattice Boltzmann model

Lattice Boltzmann simulation of power-law fluid flow in the mixing section of a single-screw extruder

Simulation of High-Viscosity Generalized Newtonian Fluid Flows in the Mixing Section of a Screw Extruder Using the Lattice Boltzmann Model

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