Optimal control of lift/drag ratios on a rotating cylinder
Abstract
We present the numerical solution to a problem of maximizing the lift to drag ratio by rotating a circular cylinder in a twodimensional viscous incompressible flow. This problem is viewed as a test case for the newly developing theoretical and computational methods for control of fluid dynamic systems. We show that the time averaged lift to drag ratio for a fixed finitetime interval achieves its maximum value at an optimal rotation rate that depends on the time interval.
 Publication:

Applied Mathematics Letters
 Pub Date:
 May 1992
 Bibcode:
 1992ApMaL...5...57O
 Keywords:

 Incompressible Flow;
 Lift Drag Ratio;
 Optimal Control;
 Rotating Cylinders;
 Two Dimensional Flow;
 Viscous Flow;
 Finite Difference Theory;
 Fluid Dynamics;
 NavierStokes Equation;
 Poisson Equation;
 Reynolds Number;
 Fluid Mechanics and Heat Transfer