Rheological transient effects on steady-state contraction flows

IF 2.3 3区工程技术 Q2 MECHANICS Rheologica Acta Pub Date : 2023-02-09 DOI:10.1007/s00397-023-01385-0

Karen Y. Pérez-Salas, Salvador Sánchez, Roberto Velasco-Segura, Gabriel Ascanio, Leopoldo Ruiz-Huerta, Juan P. Aguayo

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引用次数: 2

Abstract

It may be assumed that the steady-state kinematics of viscoelastic contraction flows depends on the time-independent rheological properties only. This idea is supported by the large number of references explaining steady simulation results by considering only steady-state material functions. Even with numerical simulations, it would be difficult to prove such a statement wrong. However, using the Bautista-Manero-Puig class of models allows to obtain the same steady rheological response but with different transient evolution. Here, we considered two fluids, one displaying a monotonic trend towards the steady-state and the other with at least one visible overshoot in the material functions. Our results show that for the transient evolution with the overshoot fluid, a significant increase in the steady pressure drop is gathered. In addition, vortex response is quite different for the two fluids. This research gives evidence that the transient evolution in rheometrical functions has great impact on steady-state flow behavior.

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稳态收缩流的流变瞬态效应

可以假设粘弹性收缩流的稳态运动学只依赖于与时间无关的流变性能。这一观点得到了大量只考虑稳态材料函数来解释稳态模拟结果的文献的支持。即使用数值模拟，也很难证明这种说法是错误的。然而，使用Bautista-Manero-Puig类模型可以获得相同的稳态流变响应，但具有不同的瞬态演化。在这里，我们考虑了两种流体，一种表现出向稳态的单调趋势，另一种在材料函数中至少有一个可见的超调。结果表明，随着超调流体的加入，瞬态演化过程中稳态压降显著增大。此外，两种流体的涡响应也有很大的不同。该研究证明流变函数的瞬态演化对稳态流动行为有很大影响。

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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."

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