98 lines
3.5 KiB
Text
98 lines
3.5 KiB
Text
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/*---------------------------------------------------------------------------*\
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| ========= | |
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| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
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| \\ / O peration | Version: 1.4 |
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| \\ / A nd | Web: http://www.openfoam.org |
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| \\/ M anipulation | |
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\*---------------------------------------------------------------------------*/
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FoamFile
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{
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version 2.0;
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format ascii;
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root "";
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case "";
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instance "";
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local "";
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class dictionary;
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object viscoelasticProperties;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * /
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/*
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From:
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VERBEETEN, W. M. H.; PETERS, G. W. M.; BAAIJENS, F. P. T. Viscoelastic analysis
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of complex polymer melt flows using the extended pom-pom model. Journal
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of Non-Newtonian Fluid Mechanics, v. 108, n. 1-3, p. 301-326, 2002.
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Table 1
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Linear and non-linear parameters for fitting of the DSM Stamylan LD 2008 XC43 LDPE melt
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i Maxwell parameters Exponential PTT
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Gi (Pa) li (s) epi zei
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1 7.2006e4 3.8946e-3 0.30 0.08
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2 1.5770e4 5.1390e-2 0.20 0.08
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3 3.3340e3 5.0349e-1 0.02 0.08
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4 3.0080e2 4.5911e0 0.02 0.08
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Tr = 170 C; activation energy: E0 = 48.2 kJ/mol; WLF-shift parameters: C1 = 14.3K, C2 = 480.8K.
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*/
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rheology
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{
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type multiMode;
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models
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(
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first
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{
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type PTT-Exponential;
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rho rho [1 -3 0 0 0 0 0] 850;
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etaS etaS [1 -1 -1 0 0 0 0] 0.0;
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etaP etaP [1 -1 -1 0 0 0 0] 280.43457;
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lambda lambda [0 0 1 0 0 0 0] 3.8946e-3;
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epsilon epsilon [0 0 0 0 0 0 0] 0.3;
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zeta zeta [0 0 0 0 0 0 0] 0.08;
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}
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second
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{
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type PTT-Exponential;
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rho rho [1 -3 0 0 0 0 0] 850;
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etaS etaS [1 -1 -1 0 0 0 0] 0.0;
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etaP etaP [1 -1 -1 0 0 0 0] 810.4203;
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lambda lambda [0 0 1 0 0 0 0] 5.1390e-2;
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epsilon epsilon [0 0 0 0 0 0 0] 0.2;
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zeta zeta [0 0 0 0 0 0 0] 0.08;
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}
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third
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{
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type PTT-Exponential;
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rho rho [1 -3 0 0 0 0 0] 850;
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etaS etaS [1 -1 -1 0 0 0 0] 0.0;
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etaP etaP [1 -1 -1 0 0 0 0] 1678.6357;
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lambda lambda [0 0 1 0 0 0 0] 5.0349e-1;
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epsilon epsilon [0 0 0 0 0 0 0] 0.02;
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zeta zeta [0 0 0 0 0 0 0] 0.08;
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}
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fourth
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{
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type PTT-Exponential;
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rho rho [1 -3 0 0 0 0 0] 850;
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etaS etaS [1 -1 -1 0 0 0 0] 0.0;
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etaP etaP [1 -1 -1 0 0 0 0] 1381.0029;
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lambda lambda [0 0 1 0 0 0 0] 4.5911e0;
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epsilon epsilon [0 0 0 0 0 0 0] 0.02;
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zeta zeta [0 0 0 0 0 0 0] 0.08;
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}
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);
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}
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// ************************************************************************* //
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