Abstract
The evolution of a spot, generated in one of the laminar boundary layers in the entrance region of a two-dimensional duct, has been studied using ensemble averaged velocity and wall shear stress distributions in the plane of symmetry of the spot. The potential flow field of the spot triggers a second spot on the opposite wall of the duct. This new spot grows quickly until the turbulent regions occupied by the two spots completely fill the width of the duct and then propogates at the same convective velocity as the original spot. This transition mechanism differs significantly from that observed, when a spot is introduced in a plane Poiseuille flow; in this case, the spot fills the duct almost immediately after it is generated.
| Original language | English |
|---|---|
| Pages (from-to) | 751-758 |
| Number of pages | 8 |
| Journal | PCH. Physicochemical hydrodynamics |
| Volume | 6 |
| Issue number | 5-6 |
| State | Published - 1984 |
| Externally published | Yes |
| Event | Physicochem Hydrodyn, 5th Int Conf - Tel Aviv, Isr Duration: 16 Dec 1984 → 21 Dec 1984 |