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Reduced order modeling of some fluid flows of industrial interest
Alonso Fernández, Diego and Terragni, Filippo and Velázquez López, Ángel Gerardo and Vega de Prada, José Manuel
Reduced order modeling of some fluid flows of industrial interest.
"Fluid Dynamics Research", v. 44
Some basic ideas are presented for the construction of robust, computationally efficient reduced order models amenable to be used in industrial environments, combined with somewhat rough computational fluid dynamics solvers. These ideas result from a critical review of the basic principles of proper orthogonal decomposition-based reduced order modeling of both steady and unsteady fluid flows. In particular, the extent to which some artifacts of the computational fluid dynamics solvers can be ignored is addressed, which opens up the possibility of obtaining quite flexible reduced order models. The methods are illustrated with the steady aerodynamic flow around a horizontal tail plane of a commercial aircraft in transonic conditions, and the unsteady lid-driven cavity problem. In both cases, the approximations are fairly good, thus reducing the computational cost by a significant factor.
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