Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10415501 | Computers & Fluids | 2005 | 19 Pages |
Abstract
Direct numerical simulation (DNS) for the flow separation and transition around a NACA 0012 airfoil with an attack angle of 4° and Reynolds number of 105 based on free-stream velocity and chord length is presented. The details of the flow separation, detached shear layer, vortex shedding, breakdown to turbulence, and re-attachment of the boundary layer are captured in the simulation. Though no external disturbances are introduced, the self-excited vortex shedding and self-sustained turbulent flow may be related to the backward effect of the disturbed flow on the separation region. The vortex shedding from the separated free shear layer is attributed to the Kelvin-Helmholtz instability.
Related Topics
Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
Hua Shan, Li Jiang, Chaoqun Liu,