Author(s)

Liangzhou Zhang ¹, Yuzhe Cheng ¹

Affiliation(s)

¹ School of Mathematics, Yangzhou University, Yangzhou, 225002, Jiangsu, China

Corresponding Author

Liangzhou Zhang

ABSTRACT

This paper constructs a lattice Boltzmann-finite volume-finite difference (LB-FV-FD) multiphysics coupled numerical framework for the flow-induced crystallization process of semi-crystalline polymers, achieving efficient solutions for fluid momentum, latent heat transport, and phase-field interface evolution. The second-order convergence accuracy of the algorithm is verified through static benchmark tests. Furthermore, the evolution of crystals under the flow wake around a cylinder is investigated. The results show that local turbulent shearing and asymmetric diffusion of latent heat break the symmetry of crystal growth from both dynamic and thermodynamic perspectives, inducing severe distortion of the solid-liquid interface along the streamline. The crystal aspect ratio exhibits a nonlinear characteristic of initial sudden increase followed by exponential decay, revealing the dominant role of strong convection in determining mesoscopic morphological distortion, and providing a theoretical basis for optimizing polymer molding processes.

KEYWORDS

Polymer Crystallization; Flow-Induced; Phase-Field Model; Multi-Field Coupling; LB-FV-FD Method

CITE THIS PAPER

Liangzhou Zhang, Yuzhe Cheng. Multi-Field Coupled Numerical Simulation Study on the Evolution of Semi-Crystalline Polymer Crystals under the Action of Flow Field. Modern Physical Chemistry Research (2026) Vol. 6, No.1, 1-9. DOI: http://dx.doi.org/10.23977/mpcr.2026.060101.

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