Fluid Elasticity in Plastic Pipe Extrusion: Loads on Die Barrel

Saengow, Chaimongkol; Giacomin, A. Jeffrey

doi:10.3139/217.3553

Cited by 16 publications

(5 citation statements)

References 32 publications

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“…In this section, we will consider the effects due to the elasticity of polymeric liquids, which are observed when flowing through capillaries (channels). In this regard, the original study [ 15 ] complements the presented review.…”

Section: The Role Of Elasticity In Polymer Processingmentioning

confidence: 87%

The Elasticity of Polymer Melts and Solutions in Shear and Extension Flows

2023

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This review is devoted to understanding the role of elasticity in the main flow modes of polymeric viscoelastic liquids—shearing and extension. The flow through short capillaries is the central topic for discussing the input of elasticity to the effects, which are especially interesting for shear. An analysis of the experimental data made it possible to show that the energy losses in such flows are determined by the Deborah and Weissenberg numbers. These criteria are responsible for abnormally high entrance effects, as well as for mechanical losses in short capillaries. In addition, the Weissenberg number determines the threshold of the flow instability due to the liquid-to-solid transition. In extension, this criterion shows whether deformation takes place as flow or as elastic strain. However, the stability of a free jet in extension depends not only on the viscoelastic properties of a polymeric substance but also on the driving forces: gravity, surface tension, etc. An analysis of the influence of different force combinations on the shape of the stretched jet is presented. The concept of the role of elasticity in the deformation of polymeric liquids is crucial for any kind of polymer processing.

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Section: The Role Of Elasticity In Polymer Processingmentioning

confidence: 87%

The Elasticity of Polymer Melts and Solutions in Shear and Extension Flows

2023

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“…However, Bessel functions appear 42 times in Eqs. (48) and (49), and each of these Bessel functions appears within a summation to infinity. This is why, despite our use of an exact solution, the computational cost of our investigation is not low.…”

Section: Discussionmentioning

confidence: 99%

“…The corotational framework has been studied extensively, both in theory [1,2,19,23] and in its applications [22,45,46,47,48,49]. The simplest special case of this framework is the corotational Maxwell fluid:…”

Section: Corotational Maxwell Fluidmentioning

confidence: 99%

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Thermodynamic instability of polymeric liquids in large-amplitude oscillatory shear flow from corotational Maxwell fluid

Saengow¹,

Giacomin²

2018

Fluid Dyn. Res.

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“…γ . This framework has been studied extensively, both in theory [36] and in engineering practice [37,38,39]. This framework has been successfully applied to capture rheology of polymer melts and solutions [40,41,42], and wormlike micelles [43].…”

Section: 3-1 Of [51])mentioning

confidence: 99%