A numerical method for steady and nonisothermal viscoelastic fluid flow for high Deborah and Péclet numbers |
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| Authors: | Peter Wapperom M A Hulsen Jaap P P M van der Zanden |
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| Affiliation: | (1) Delft University of Technology Faculty of Mechanical Engineering and Marine Technology Laboratory for Aero and Hydrodynamics Rotterdamsweg 145 2628 AL Delft The Netherlands e-mail: p.wapperom@wbmt.tudelft.nl, NL |
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| Abstract: | A combined finite element/streamline integration method is presented for nonisothermal flows of viscoelastic fluids. The
attention is focused on some characteristic problems that arise for numerical simulation of flows with high Deborah and Péclet
numbers. The two most important problems to handle are the choice of an outflow boundary condition for not completely developed
flow and the treatment of the dissipative term in the temperature equation. The ability of the numerical method to handle
high Deborah and Péclet numbers will be demonstrated on a contraction flow of an LDPE melt with isotropic and anisotropic
heat conductivity. The influence of anisotropic heat conduction and the difference between the stress work and mechanical
dissipation will be discussed for contraction flows.
Received: 4 February 1997 Accepted: 23 October 1997 |
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| Keywords: | Nonisothermal viscoelastic flow differential stress models combined finite element/streamline integration outflow boundary conditions dissipation anisotropic heat conduction |
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