Theoretical study on Poiseuille flow of thixotropic yield stress fluids: an exact solution

IF 2.3 3区工程技术 Q2 MECHANICS

Rheologica Acta Pub Date : 2024-02-08 DOI:10.1007/s00397-024-01431-5

Ren Jiangtao, Yin Deshun, Zhao Bin, Ma Liangzhu

引用次数: 0

Abstract

The steady pipe flow of thixotropic yield stress fluids has been investigated theoretically based on a modified isotropic kinematic hardening (mIKH) model. Analytical solution is derived for a specific case (m = n = 1) and a general semi-analytical solution is put forward as well. The effect of thixotropic yield stress on shear rate and velocity profiles is illustrated by comparing to other well-known solutions. Moreover, the influences of model parameters are examined. It is worth noting that shear banding may occur at the yielded surface in case of a sufficiently large Bingham number, thixotropic number, and flow index, but a sufficient small value of structure-related exponent.

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触变屈服应力流体的 Poiseuille 流动理论研究：精确解法

基于修正的各向同性运动硬化（mIKH）模型，对触变屈服应力流体的稳定管道流动进行了理论研究。针对特定情况（m = n = 1）得出了分析解，并提出了一般的半分析解。通过与其他著名解法的比较，说明了触变屈服应力对剪切速率和速度曲线的影响。此外，还考察了模型参数的影响。值得注意的是，在宾汉数、触变数和流动指数足够大，但结构相关指数足够小的情况下，屈服表面可能会出现剪切带。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rheologica Acta 物理-力学

CiteScore

4.60

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： "Rheologica Acta is the official journal of The European Society of Rheology. The aim of the journal is to advance the science of rheology, by publishing high quality peer reviewed articles, invited reviews and peer reviewed short communications. The Scope of Rheologica Acta includes: - Advances in rheometrical and rheo-physical techniques, rheo-optics, microrheology - Rheology of soft matter systems, including polymer melts and solutions, colloidal dispersions, cement, ceramics, glasses, gels, emulsions, surfactant systems, liquid crystals, biomaterials and food. - Rheology of Solids, chemo-rheology - Electro and magnetorheology - Theory of rheology - Non-Newtonian fluid mechanics, complex fluids in microfluidic devices and flow instabilities - Interfacial rheology Rheologica Acta aims to publish papers which represent a substantial advance in the field, mere data reports or incremental work will not be considered. Priority will be given to papers that are methodological in nature and are beneficial to a wide range of material classes. It should also be noted that the list of topics given above is meant to be representative, not exhaustive. The editors welcome feedback on the journal and suggestions for reviews and comments."