A level set based immersed boundary method for simulation of non-isothermal viscoelastic melt filling process

Qiang Li; Fangcao Qu

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A level set based immersed boundary method for simulation of non-isothermal viscoelastic melt filling process

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- A level set based immersed boundary method for simulation of non-isothermal viscoelastic melt filling process
- Chinese Journal of Chemical Engineering Vol. 32, Issue 4, Pages: 119-133(2021)
- Affiliations：
  
  School of Mathematics and Information Science, Henan Polytechnic University,Jiaozuo,China,454003
- Author bio：
- Funds：
- DOI：
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- Published：2021
- Accepted：
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Qiang Li, Fangcao Qu. A level set based immersed boundary method for simulation of non-isothermal viscoelastic melt filling process[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 119-133.
DOI：

Qiang Li, Fangcao Qu. A level set based immersed boundary method for simulation of non-isothermal viscoelastic melt filling process[J]. Chinese Journal of Chemical Engineering, 2021, 32(4): 119-133. DOI：

摘要

Abstract

In this work

the polymer melt filling process is simulated by using a coupled finite volume and level-set based immersed boundary (LS-IB) method. Firstly

based on a shape level set (LS) function to represent the mold boundary

a LS-IB method is developed to model the complex mold walls. Then the nonisothermal melt filling process is simulated based on non-Newtonian viscoelastic equations with different Reynolds numbers in a circular cavity with a solid core

and the effects of Reynolds number on the flow patterns of polymer melt are presented and compared with each other. And then for a true polymer melt with a small Reynolds number that varies with melt viscosity

the moving interface

the temperature distributions and the molecular deformation are shown and analyzed in detail. At last

as a commonly used application case

a socket cavity with seven inserts is investigated. The corresponding physical quantities

such as the melt velocity

molecular deformation

normal stresses

first normal stress difference

temperature distributions and frozen layer are analyzed and discussed. The results could provide some predictions and guidance for the polymer processing industry.

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