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Numerical solution of parametrized Navier–Stokes equations by reduced basis methods
Author(s) -
Quarteroni Alfio,
Rozza Gianluigi
Publication year - 2007
Publication title -
numerical methods for partial differential equations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.901
H-Index - 61
eISSN - 1098-2426
pISSN - 0749-159X
DOI - 10.1002/num.20249
Subject(s) - mathematics , navier–stokes equations , galerkin method , partial differential equation , projection (relational algebra) , basis (linear algebra) , interpolation (computer graphics) , context (archaeology) , convergence (economics) , nonlinear system , parametric statistics , mathematical analysis , compressibility , geometry , algorithm , computer science , physics , quantum mechanics , economic growth , engineering , economics , biology , aerospace engineering , animation , paleontology , statistics , computer graphics (images)
Abstract We apply the reduced basis method to solve Navier–Stokes equations in parametrized domains. Special attention is devoted to the treatment of the parametrized nonlinear transport term in the reduced basis framework, including the case of nonaffine parametric dependence that is treated by an empirical interpolation method. This method features (i) a rapid global convergence owing to the property of the Galerkin projection onto a space W N spanned by solutions of the governing partial differential equation at N (optimally) selected points in the parameter space, and (ii) the offline/online computational procedures that decouple the generation and projection stages of the approximation process. This method is well suited for the repeated and rapid evaluations required in the context of parameter estimation, design, optimization, and real‐time control. Our analysis focuses on: (i) the pressure treatment of incompressible Navier–Stokes problem; (ii) the fulfillment of an equivalent inf – sup condition to guarantee the stability of the reduced basis solutions. The applications that we consider involve parametrized geometries, like e.g. a channel with curved upper wall or an arterial bypass configuration. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 23: 923–948, 2007