Multiscale SPH simulations of viscoelastic injection molding processes based on bead-spring chain model

Xu, Xiaoyang1; Tian, Lingyun1; Yu, Peng2

2023-04-01

10.1016/j.enganabound.2023.01.035

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS   Impact Factor & Quartile

0955-7997

1873-197X

In this paper we present an extension of a multiscale smoothed particle hydrodynamics (SPH) method to tran-sient viscoelastic injection molding processes. Specifically, we use the method presented by Xu and Yu, J. Non-Newtonian Fluid Mech. 229 (2016) pp. 27-42, in which the bead-spring chain model is employed to describe the viscoelastic behavior of the fluid without resort to a closed-form constitutive equation. Moreover, to resolve the heavy computation and the time-consuming problem, an efficient parallel algorithm, including parallelizations of both SPH particles and Brownian configuration fields, is developed. To validate the algorithm, we first simulate the viscoelastic Couette flow based on Hookean dumbbell, FENE dumbbell, and FENE chain models. The SPH results are compared with the analytical solutions or those obtained by other methods. The parallel performances of the algorithm are analyzed. Then, we extend the method to the challenging injection molding problem. A number of numerical examples including the injection molding of an F-shaped cavity in two dimensions and a door handle in two and three dimensions are investigated. Some molecular information such as the molecular stretch, the orientation angle, and the mean configuration thickness are displayed. It is found that the injection molding processes could be successfully investigated by SPH from a micro perspective. The proposed parallel algorithm is essential for the efficient simulation of injection molding processes. The maximum speedup can reach more than 130 for the case of the door handle in three dimensions.

Smoothed particle hydrodynamic Multiscale Parallel Injection molding Bead-spring chain

SCI

English

Others

National Natural Science Foundation of China[12071367] ; Shenzhen Science and Technology Innovation Commission[JCYJ2018050416 5704491] ; Shaanxi Youth Top-notch Talent Program[289890259] ; Shaanxi Youth New Star Program of Science and Technology[2019KJXX-012] ; Guangdong Provincial Key Laboratory of Turbulence Research and Applications[2019B21203001]

Engineering ; Mathematics

Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications

WOS:000927327300001

ELSEVIER SCI LTD

ENGINEERING

2-s2.0-85149745571

Web of Science

1.Xian Univ Sci & Technol, Sch Comp Sci & Technol, Xian 710054, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Guangdong Prov Key Lab Turbulence Res & Applicat, Shenzhen 518055, Peoples R China

Xu, Xiaoyang,Tian, Lingyun,Yu, Peng. Multiscale SPH simulations of viscoelastic injection molding processes based on bead-spring chain model[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2023,149:213-230.

Xu, Xiaoyang,Tian, Lingyun,&Yu, Peng.(2023).Multiscale SPH simulations of viscoelastic injection molding processes based on bead-spring chain model.ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,149,213-230.

Xu, Xiaoyang,et al."Multiscale SPH simulations of viscoelastic injection molding processes based on bead-spring chain model".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 149(2023):213-230.