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arXiv 2204.04320physics.flu-dyn
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几乎不可压缩粘弹性膜的数值模拟

Numerical Simulations of Nearly Incompressible Viscoelastic Membranes

Valeria Barra, Shawn A. Chester, Shahriar Afkhami

摘要:

本文提出了一种新的粘弹性液膜自由边界流动动力学的数值研究方法。控制方程描述了线性动量的平衡,其中的应力包括麦克斯韦型变形的粘弹性响应。采用罚函数法,使粘弹性介质近似不可压缩,罚函数常数与流体的粘度成正比。一个有限元方法,其中细长的几何形状代表的液体膜,是离散的线性三节点三角形元素在平面应力条件下。感兴趣的两个应用程序被认为是提供的数值框架:剪切流,拉伸过程中的拉伸流。

英文摘要:

This work presents a novel numerical investigation of the dynamics of free-boundary flows of viscoelastic liquid membranes. The governing equation describes the balance of linear momentum, in which the stresses include the viscoelastic response to deformations of Maxwell type. A penalty method is utilized to enforce near incompressibility of the viscoelastic media, in which the penalty constant is proportional to the viscosity of the fluid. A finite element method is used, in which the slender geometry representing the liquid membrane, is discretized by linear three-node triangular elements under plane stress conditions. Two applications of interest are considered for the numerical framework provided: shear flow, and extensional flow in drawing processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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