Unsteady three-dimensional marginal separation, including breakdown
Abstract
A situation involving a three-dimensional marginal separation is considered, where a (steady) boundary layer flow is on the verge of separating at a point (located along a line of symmetry/centerline). At this point, a triple-deck is included, thereby permitting a small amount of interaction to occur. Unsteadiness is included within this interaction region through some external means. It is shown that the problem reduces to the solution of a nonlinear, unsteady, partial-integro system, which is solved numerically by means of time-marching together with a pseudo-spectral method spatially. A number of solutions to this system are presented which strongly suggest a breakdown of this system may occur, at a finite spatial position, at a finite time. The structure and details of this breakdown are then described.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1990
- Bibcode:
- 1990STIN...9020337D
- Keywords:
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- Boundary Layer Separation;
- Separated Flow;
- Spectral Methods;
- Steady Flow;
- Three Dimensional Models;
- Boundary Layer Flow;
- Cross Flow;
- Kinematics;
- Nonlinearity;
- Viscosity;
- Fluid Mechanics and Heat Transfer