Tang, Zemei; Hu, Wenrui Thermocapillary effect in a thermal rheological jet. (English) Zbl 1189.80031 J. Non-Equilibrium Thermodyn. 31, No. 4, 385-396 (2006). Summary: The process of die swell in polymer jets is an important feature within polymer processing and can be explained through a study of its rheological effects. The existence of a thermocapillary effect, driven by the gradient of its surface tension, should be considered when examining a thermal jet that has a non-uniform temperature distribution on its free surface, as in various polymer processings. Both the rheological effect and thermocapillary effect on die swell can be studied numerically through a finite element method as used on a two-dimensional and unsteady model, in which a Coleman-Noll second-order fluid model is employed. The results show that the expanding angle depends on both the rheological property of the fluid and the pressure at the vessel exit. Although both the thermocapillary and the rheological effects contribute to the cross-section expansion of the fluid jet, the latter is more important in determining the expansion. MSC: 80A20 Heat and mass transfer, heat flow (MSC2010) 76A05 Non-Newtonian fluids 76D45 Capillarity (surface tension) for incompressible viscous fluids Keywords:polymer processing; thermocapillary effect; rheological effect; Coleman-Noll model; non-Newtonian fluids PDFBibTeX XMLCite \textit{Z. Tang} and \textit{W. Hu}, J. Non-Equilibrium Thermodyn. 31, No. 4, 385--396 (2006; Zbl 1189.80031) Full Text: DOI References: [1] DOI: 10.1016/S0377-0257(98)00119-0 · Zbl 0974.76503 · doi:10.1016/S0377-0257(98)00119-0 [2] Tanner R.I., J. Polym. Sci. 3 pp 2067– (1970) [3] DOI: 10.1021/la961020a · doi:10.1021/la961020a [4] DOI: 10.1146/annurev.fluid.31.1.347 · doi:10.1146/annurev.fluid.31.1.347 [5] DOI: 10.1021/la991563v · doi:10.1021/la991563v [6] DOI: 10.1016/S0017-9310(00)00026-0 · Zbl 1004.76022 · doi:10.1016/S0017-9310(00)00026-0 [7] DOI: 10.1016/S0094-5765(02)00286-2 · doi:10.1016/S0094-5765(02)00286-2 [8] Hu W.R., Sci. China, Ser. A 45 pp 1171– (2002) [9] DOI: 10.1360/03yw0034 · doi:10.1360/03yw0034 [10] DOI: 10.1063/1.857763 · Zbl 0699.76091 · doi:10.1063/1.857763 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.