Phänomenologische Rheologie

Giesekus, Hanswalter

doi:10.1007/978-3-642-57953-0

Cited by 86 publications

(50 citation statements)

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“…For the use of shear viscosity models in three-dimensional (3D) flow fields, a representative scalar shear rate can be defined. It is based on the dyadic product of the deformation gradient tensor according to Giesekus [20] or Bird et al [21]:…”

Section: Non-newtonian Shear Viscosity Modelmentioning

confidence: 99%

Experimental and Numerical Investigation of Pressure Swirl Atomizers

2011

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The prediction of droplet size distributions for atomization nozzles is important for process design and improvement of industrial spraying processes. However, especially for non-Newtonian liquids, the published research applicable for engineering purposes is rare. To derive fundamental correlations for droplet size distributions in the future, the multiphase flow inside the spray nozzle is investigated by computational fluid dynamics, and measurements of droplet size distributions are done under the same flow conditions. In the present paper, two different hollow-cone nozzles were investigated using the volume-of-fluid method with largeeddy turbulence modeling inside the open source software OpenFOAM®. An experimental test rig suitable for spraying organic solvents was built.

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Section: Non-newtonian Shear Viscosity Modelmentioning

confidence: 99%

Experimental and Numerical Investigation of Pressure Swirl Atomizers

2011

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“…Zur Beschreibung des viskoelastischen Materialverhaltens kommt das verallgemeinerte, kontravariante Maxwell-Oldroyd-Modell zur Anwendung [5]. Die Modellgleichungen lauten:…”

Section: Impulstransportunclassified

Modelluntersuchungen zur Restentgasung von Kunststoffschmelzen mit gasförmigen Schleppmitteln in einem statischen Entgasungsapparat – 1. Teil: Modellierung des Wachstums eines geschlossenzelligen Polymerschaums

Piesche

Nonnenmacher

Schütz

2008

Chemie Ingenieur Technik

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“…and the momentum balance (Cauchy equation), The viscoelastic properties of the fluid are described using the corotational model [16] with the constitutive equation for the stress tensor S given by…”

Section: The Annular Liquid Sheetmentioning

confidence: 99%

Linear stability of non-Newtonian annular liquid sheets

1999

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Summary. This paper reports a linear stability analysis of a non-Newtonian annular liquid sheet that is surrounded by nonviscous fluids in relative axial motion to it. It is shown that for a stress free basic flow the dispersion relation giving the absolute and convective instability mechanisms can be immediately obtained from the dispersion relation for a Newtonian sheet by introducing a wavenumber dependent "viscosity". The stability behavior of the sheet is investigated numerically by a continuation algorithm, by which the solution branches of the dispersion relation, relevant for the stability information, can be traced. The results give a stability picture which covers the whole range of annular sheets from the cylindrical jet to the plane liquid curtain.

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Phänomenologische Rheologie

Cited by 86 publications

References 0 publications

Experimental and Numerical Investigation of Pressure Swirl Atomizers

Experimental and Numerical Investigation of Pressure Swirl Atomizers

Modelluntersuchungen zur Restentgasung von Kunststoffschmelzen mit gasförmigen Schleppmitteln in einem statischen Entgasungsapparat – 1. Teil: Modellierung des Wachstums eines geschlossenzelligen Polymerschaums

Linear stability of non-Newtonian annular liquid sheets

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