Phase relations in a forced turbulent boundary layer: implications for modelling of high Reynolds number wall turbulence
Abstract
Phase relations between specific scales in a turbulent boundary layer are studied here by highlighting the associated nonlinear scale interactions in the flow. This is achieved through an experimental technique that allows for targeted forcing of the flow through the use of a dynamic wall perturbation. Two distinct large-scale modes with well-defined spatial and temporal wavenumbers were simultaneously forced in the boundary layer, and the resulting nonlinear response from their direct interactions was isolated from the turbulence signal for the study. This approach advances the traditional studies of large- and small-scale interactions in wall turbulence by focusing on the direct interactions between scales with triadic wavenumber consistency. The results are discussed in the context of modelling high Reynolds number wall turbulence.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 13, 2017
- Source ID
- 10.1098/rsta.2016.0080
Entities
People
- Beverley McKeon
- Subrahmanyam Duvvuri
Organizations
- Air Force Office of Scientific Research