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Path following methods forsteady laminar Bingham flowin cylindrical pipes

Published online by Cambridge University Press:  16 October 2008

Juan Carlos De Los Reyes  and
Sergio González
Juan Carlos De Los Reyes
Affiliation:
Research Group on Optimization, Departmento de Matemática, EPN Quito, Ecuador. [email protected]; [email protected]
Sergio González
Affiliation:
Research Group on Optimization, Departmento de Matemática, EPN Quito, Ecuador. [email protected]; [email protected]
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Abstract

This paper is devoted to the numerical solution of stationarylaminar Bingham fluids by path-following methods. By using duality theory, asystem that characterizes the solution of the original problem is derived.Since this system is ill-posed, a family of regularized problems is obtainedand the convergence of the regularized solutions to the original one is proved.For the update of the regularization parameter, a path-following method isinvestigated. Based on the differentiability properties of the path, a model ofthe value functional and a correspondent algorithm are constructed. For thesolution of the systems obtained in each path-following iteration a semismoothNewton method is proposed. Numerical experiments are performed in order toinvestigate the behavior and efficiency of the method, and a comparison with apenalty-Newton-Uzawa-conjugate gradient method, proposed in [Dean et al., J. Non-Newtonian Fluid Mech.142 (2007) 36–62], iscarried out.

Keywords

Bingham fluidsvariational inequalities of second kindpath-following methodssemi-smooth Newton methods.
Type
Research Article
Information
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 43 , Issue 1 , January 2009 , pp. 81 - 117
Copyright
© EDP Sciences, SMAI, 2008

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