Leopold Škerget (Author), Matej Požarnik (Author), Tatjana Županek (Translator)

Abstract

ǂV ǂprispevku je prikazan razvoj numerične sheme na osnovi metode robnih elementov (MRE) za modeliranje ravninskih tokov viskoelastične tekočine. Kot podlaga za razvoj je namenjena shema za modeliranje nestisljivih viskoznih tokov, ki smo jo razširili in ji dodali potrebne člene za zajemanje viskoelastičnosti nenewtonovskih tekočin. Posebno pozornost smo namenili integraciji ohranitvenih zakonov in reoloških modelov. Shema je zapisana za hitrostno-vrtinčno formulacijo vodilnih enačb. Kot testni primeri so predstavljeni tokovi nenewtonovske Maxwellove tekočine v kanalih različnih geometrijskih oblik.

Keywords

dinamika tekočin;Maxwellovi modeli;modeli Maxwellovi;modeli robnih elementov;numerični modeli;reologija;tekočine viskoelastične;viskoelastičnost

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: Association of Mechanical Engineers and Technicians of Slovenia et al.
UDC: 519.61/.64:532.5
COBISS: 5755419 Link will open in a new window
ISSN: 0039-2480
Parent publication: Strojniški vestnik
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Other data

Secondary language: English
Secondary title: ǂThe ǂboundary-element method for the dynamics of a viscoelastic Maxwell fluid
Secondary abstract: ǂIn ǂthis paper we show a numerical scheme based on the boundary-element method (BEM) for the numerical modeling of planar, viskoelastic fluid flows. In particular, the singular-boundary-integral approach, which has been established for the viscous, incompressible flow problem, is modified and extended to include the viscoelastic fluid state. Special attention is given to a proper integration of the conservation and constitutive equations. A velocity-vorticity formulation of the governing equations is adopted. As test cases, non-Newtonian-Maxwell fluid flows in the channels of various geometries are studied.
Secondary keywords: boundary element methods;fluid dynamics;viscoelastic fluids;Maxwell models;modeli robnih elementov;dinamika tekočin;tekočine viskoelastične;modeli Maxwellovi;
URN: URN:NBN:SI
Type (COBISS): Not categorized
Pages: str. 645-662
Volume: ǂLetn. ǂ48
Issue: ǂšt. ǂ12
Chronology: 2002
ID: 1746711