This work is devoted to the numerical comparison of four active control techniques in order to increase the pressure recovery generated by the deceleration of a slightly compressible viscous flow over a dihedral plane. It is performed by the use of vortex generator jets and intrusive sensors. The governing equations, the two-dimensional direct numerical simulation code and the flow configuration are first briefly recalled. Then, the objective of the control is carefully displayed, and the uncontrolled...
This work is devoted to the numerical comparison of four active control
techniques in order to increase the pressure recovery generated by the
deceleration of a slightly compressible viscous flow over a dihedral plane.
It is performed by the
use of vortex generator jets and intrusive sensors. The governing equations,
the two-dimensional direct numerical simulation code and the
flow configuration are first briefly recalled. Then, the objective of the
control is carefully displayed, and the uncontrolled...
In this paper we prove the discrete compactness property for
a discontinuous Galerkin approximation of Maxwell's system
on quite general tetrahedral meshes.
As a consequence, a discrete Friedrichs inequality is obtained
and the convergence of the discrete eigenvalues to the continuous ones is deduced
using the theory of collectively compact operators.
Some numerical experiments confirm the theoretical predictions.
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