INVESTIGADORES
ARTANA Guillermo Osvaldo
congresos y reuniones científicas
Título:
Reduced Order Models For Wake Control With A Spinning Cylinder
Autor/es:
A. GRONKIS, J. D'ADAMO, A. CAMILLERI, G. ARTANA
Lugar:
Santa Fe
Reunión:
Conferencia; Fluidos 2008; 2008
Institución organizadora:
INTEC
Resumen:
We study the formulation of reduced order models for a circular spinning cylinder in
laminar vortex shedding regime. Proper orthogonal decomposition techniques based on the
snapshots generated from velocity fields and a Galerkin projection are used to generate a low
dimensional representation of the infinite dimensional system described by the Navier Stokes
equation. This kind of problem has generally been studied numerically, without taking into
consideration the constraints associated to physical experimental conditions or under the
assumption that actuations do not alter significantly the time averaged velocity field. We
propose a reduction technique that enables to obtain a control function based on the mean
velocity field deviations from the unperturbed reference flow. This function is educed with a
Gram Schmidt construction and gives rise to an extended base in which the velocity fields of
the perturbed modes are expanded. The analysis allows for easy determination of a suitable
model to describe a large range of the control parameter space, without needing to recalculate
the coefficients that define the system for new operating conditions..