New boundary conditions for simulating the filling stage of the injection molding process

Galuppo, Wagner de Campos; Magalhães, Ana Cláudia Leite; Ferrás, Luís Jorge Lima; Nóbrega, J. M.; Fernandes, Célio

doi:10.1108/ec-04-2020-0190

Cited by 6 publications

(1 citation statement)

References 19 publications

(23 reference statements)

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“…Fernandes et al [4] studied the fluid-solid interaction between particles and Newtonian fluids. Galuppo et al [5] studied the fluid-solid interaction of complex viscoelastic fluids. Gu H, Peter S., Tim S., et al used the advanced CFD software STAR-CCM+ to simulate forced heave and surge motion of axisymmetric vertical cylindrical bodies with flat and rounded [6].…”

Section: Introductionmentioning

confidence: 99%

Smoothed Particle Hydrodynamics Simulation of a Mariculture Platform under Waves

Zhang

Xie

et al. 2021

Water

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This work investigates the dynamic behaviors of floating structures with moorings using open−source software for smoothed particle hydrodynamics. DualSPHysics permits us to use graphics processing units to recreate designs that include complex calculations at high resolution with reasonable computational time. A free damped oscillation was simulated, and its results were compared with theoretical data to validate the numerical model developed. The simulated three degrees of freedom (3−DoF) (surge, heave, and pitch) of a rectangular floating box have excellent consistency with experimental data. MoorDyn was coupled with DualSPHysics to include a mooring simulation. Finally, we modelled and simulated a real mariculture platform on the coast of China. We simulated the 3−DoF of this mariculture platform under a typical annual wave and a Typhoon Dujuan wave. The motion was light and gentle under the typical annual wave but vigorous under the Typhoon Dujuan wave. Experiments at different tidal water levels revealed an earlier motion response and smaller motion range during the high tide. The results reveal that DualSPHysics combined with MoorDyn is an adaptive scheme to simulate a coupled fluid–solid–mooring system. This work provides support to disaster warning, emergency evacuation, and proper engineering design.

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Section: Introductionmentioning

confidence: 99%

Smoothed Particle Hydrodynamics Simulation of a Mariculture Platform under Waves

Zhang

Xie

et al. 2021

Water

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Two‐phase flows simulations in a space‐time framework for injection molding applications: Comparison with experimental results

Ferrer‐Fabón,

Kahve,

Alms

et al. 2024

Proc Appl Math and Mech

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High‐resolution numerical simulations of the injection molding process are crucial for precise process and part behavior prediction and tool fabrication. However, the complex flow behavior with high shear rates, rapid cooling as well as the nonlinear material properties post many challenges, and efficient high‐resolution numerical analysis is still subject to research. This study presents a simplified numerical description of the polymer flow and cooling during the injection phase, aiming for efficient and yet accurate simulations of the process. The in‐house finite‐element solver XNS is used to simulate the polymer and air flows, as a two‐phase flow, using the level‐set method. The injected polymer is characterized as a shear‐thinning flow using the non‐Newtonian Cross‐Williams‐Landel‐Ferry rheology model. To reduce the computational time, other polymer model effects such as a precise crystallization kinetics model during the injection phase have been neglected as a result of the findings of a previous study. Heading towards more efficient computations, we use a space‐time discretization, which has a higher convergence rate than commonly used time discretizations and can allow future mesh refinement in time, particularly convenient for our application. The results of the simulation are compared to the propagation of the flow front in an injection molding process of a plate part. The flow front is traced in‐situ by three aligned infrared sensors that detect the temperature increase from the mold wall. The time of flow front propagation between two sensors is in good agreement with experimental results. The peak temperature is calculated lower as compared to the experiment; however the temperature gradients are in good agreement validating the numerical model presented here.

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A seamless CAD/CAM integration approach for venting system generation in injection mold design

Hou,

Xue,

Yang

et al. 2024

Int J Adv Manuf Technol

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New boundary conditions for simulating the filling stage of the injection molding process

Cited by 6 publications

References 19 publications

Smoothed Particle Hydrodynamics Simulation of a Mariculture Platform under Waves

Smoothed Particle Hydrodynamics Simulation of a Mariculture Platform under Waves

Two‐phase flows simulations in a space‐time framework for injection molding applications: Comparison with experimental results

A seamless CAD/CAM integration approach for venting system generation in injection mold design

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