Barrett, John W. and Suli, Endre (2007) *Numerical approximation of corotational dumbbell models for dilute polymers.* Technical Report. Unspecified. (Submitted)

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## Abstract

We construct a general family of Galerkin methods for the numerical approximation of weak solutions to a coupled microscopic-macroscopic bead-spring model that arises from the kinetic theory of dilute solutions of polymeric liquids with noninteracting polymer chains. The model consists of the unsteady incompressible Navier-Stokes equations in a bounded domain Ω in R d, d=2 or 3, for the velocity and the pressure of the fluid, with an elastic extra-stress tensor as right-hand side in the momentum equation. The extra-stress tensor stems from the random movement of the polymer chains and is defined through the associated probability density function which satisfies a Fokker-Planck type parabolic equation, a crucial feature of which is the presence of a centre-of-mass diffusion term. We focus on finitely-extensible nonlinear elastic, FENE-type, dumbbell models. In the case of a corotational drag term we perform a rigorous passage to the limit as the spatial and temporal discretization parameters tend to zero, and show that a (sub)sequence of numerical solutions converges to a weak solution of this coupled Navier-Stokes-Fokker-Planck system.

Item Type: | Technical Report (Technical Report) |
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Subjects: | H - N > Numerical analysis |

Research Groups: | Numerical Analysis Group |

ID Code: | 1083 |

Deposited By: | Lotti Ekert |

Deposited On: | 07 May 2011 09:04 |

Last Modified: | 07 May 2011 09:04 |

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