Rheological models for fluid mixtures: Theoretical foundation and linear viscoelasticity

Article Computer Science, Interdisciplinary Applications

Stokes-Cahn-Hilliard formulation in sliding bi-periodic frames for the simulation of two-phase flows

Junghaeng Lee et al.

Summary: This study proposes a direct numerical simulation technique for droplet emulsions in simple shear flow in Newtonian-Newtonian liquid systems. By combining the sliding bi-periodic frame with the diffuse interface method in the finite element framework, the multi-drop problem without wall effects can be effectively treated. The method yields accurate solutions for thin interfaces and can be extended to solve more complex rheological liquids.

JOURNAL OF COMPUTATIONAL PHYSICS (2022)

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Article Materials Science, Textiles

Analysis of PLA Blends Using Weighted Relaxation Spectrum

Hyunkyu Jang et al.

Summary: This paper suggests a viscoelastic method for analyzing the microscopic structure of polymer blends using DMA and TEM, and validates this method using immiscible and miscible blends. The results confirm the effectiveness of the viscoelastic method in characterizing polymer blend structures.

FIBERS AND POLYMERS (2021)

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Review Polymer Science

Multiscale Modeling and Simulation of Polymer Blends in Injection Molding: A Review

Lin Deng et al.

Summary: This paper reviews the state-of-the-art progress in the multiscale modeling and simulation of injection molding of polymer blends, discussing technological development on a macroscale and various models for morphology evolution on a mesoscale. Strategies for scale-bridging between mold-filling flow and morphology evolution are analyzed and compared, presenting a comprehensive summary and outlook for future research in this field.

POLYMERS (2021)

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Article Physics, Multidisciplinary

A variational approach to irreversible thermodynamics

Kwang Soo Cho et al.

Summary: The authors derived a general Onsager variational principle in an intuitive and simple manner, similar to the Gauss principle of least constraint rather than the principle of least action. Their result becomes the original Onsager principle when the dissipation function is a quadratic function of fluxes and sources, and it also aligns with previous thermodynamic theories.

JOURNAL OF THE KOREAN PHYSICAL SOCIETY (2021)

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Article Mechanics