===affil2:
UMBC
===firstname:
Andrei
===firstname4:

===firstname3:

===lastname2:
Soane
===lastname:
Draganescu
===firstname5:

===affil6:

===lastname3:

===email:
draga@umbc.edu
===lastname6:

===affil5:

===otherauths:

===lastname4:

===affil4:

===lastname7:

===affil7:

===firstname7:

===postal:
Department of Mathematics and Statistics
UMBC
1000 Hilltop Circle
Baltimore, MD 21250
===firstname6:

===ABSTRACT:
We construct multigrid preconditioners to accelerate the solution process of optimal control problems constrained by the Stokes/Navier-Stokes equations. Our approach for the Stokes control problem is to eliminate the state and adjoint variables from the optimality system and to construct efficient multigrid preconditioners for the Schur-complement of the block associated with these variables. Similar preconditioners are constructed for the reduced Hessian in the Newton-PCG method for the optimal control of the stationary Navier-Stokes equations.

===affil3:

===lastname5:

===affilother:

===title:
Multigrid Preconditioners for Optimal Control Problems in Fluid Flow
===firstname2:
Ana Maria