Numerical simulation of the extrusion of strongly compressible Newtonian liquids
| Autor: | Taliadorou, Eleni G., Georgiou, Georgios C., Mitsoulis, Evan C. |
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| Přispěvatelé: | Mitsoulis, Evan C. [0000-0001-8781-4784], Georgiou, Georgios C. [0000-0002-7451-224X] |
| Rok vydání: | 2007 |
| Předmět: |
media_common.quotation_subject
Thermodynamics Die swell Extrudates well flow Inertia Compressible flow Slip Physics::Fluid Dynamics Newtonian fluid General Materials Science Newtonian liquids Boundary value problem Swelling Wall flow Newtonian flow media_common Pressure drop Compressibility Extrusion Chemistry Liquid foams Equations of state Foams Condensed Matter Physics |
| Zdroj: | Rheologica Acta Rheol.Acta |
| ISSN: | 1435-1528 0035-4511 |
| DOI: | 10.1007/s00397-007-0207-6 |
| Popis: | The axisymmetric and plane extrusion flows of a liquid foam are simulated assuming that the foam is a homogeneous compressible Newtonian fluid that slips along the walls. Compressibility effects are investigated using both a linear and an exponential equation of state. The numerical results confirm previous reports that the swelling of the extrudate decreases initially as the compressibility of the fluid is increased and then increases considerably. The latter increase is sharper in the case of the exponential equation of state. In the case of non-zero inertia, high compressibility was found to lead to a contraction of the extrudate after the initial expansion, similar to that observed experimentally with liquid foams and to decaying oscillations of the extrudate surface. The time-dependent calculations show that the oscillatory steady-state solutions are stable. These steady-state oscillatory solutions are not affected by the length of the extrudate region nor by the boundary condition along the wall. © Springer-Verlag 2007. 47 1 49 62 Cited By :26 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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