Accession Number:

ADP013670

Title:

DNS of Boundary Layer Transition Induced by a Coherent Perturbation

Descriptive Note:

Conference paper

Corporate Author:

EINDHOVEN UNIV OF TECH (NETHELANDS) DEP OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

2001-08-01

Pagination or Media Count:

8.0

Abstract:

Bypass transition of a boundary layer takes place at high main stream turbulence levels. It is governed by the intrusion of non-linear disturbances into the viscous sublayer. In this paper a numerical study is presented in which a spatially developing laminar boundary layer is subdued to large scale non- linear disturbances. The fully compressible Navier-Stokes equations are solved using direct numerical simulation with a higher order finite difference method on a collocated grid. The results show that the initially smooth disturbance rapidly changes into an arrow-head structure with the characteristics of a turbulent spot.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE