Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Numerical Simulation of Tollmien-Schlichting Waves Interacting With a Three-Dimensional and Isolated Roughness
Submission Author:
Ana Elisa Basilio , DF
Co-Authors:
Ana Elisa Basilio, Fernando H T Himeno, Marlon Sproesser Mathias, Marcello Augusto Faraco de Medeiros
Presenter: Ana Elisa Basilio
doi://10.26678/ABCM.ENCIT2020.CIT20-0768
Abstract
The nonlinear instability and transition to turbulent flow are investigated through a direct numerical simulation of a flat plate with a three-dimensional isolated roughness element immersed in a laminar boundary layer flow. The roughness element with height of 0.1 times the boundary layer displacement thickness is located downstream from a disturbance source, which produces two-dimensional Tollmien-Schlichting (TS) waves. Results on this study show the roughness influence on the evolution of the TS waves, such as scattering of the waves into three-dimensional structures and weak distortion of the mean flow.
Keywords
Roughness, Tollmien-Schlichting Wave, direct numerical simulation, boundary layer stability
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