Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Numerical study of the influence of spanwise wavelength on the evolution of Görtler vortices for unsteady disturbances
Submission Author:
Adriano Takata , SP
Co-Authors:
Adriano Takata, Josuel Kruppa Rogenski, Leandro Franco de Souza
Presenter: Adriano Takata
doi://10.26678/ABCM.ENCIT2018.CIT18-0825
Abstract
Boundary fluid flow over a concave surface can be unstable to disturbance generating streamwise-oriented counter-rotating vortices. These vortices are known as Gortler vortices. Due to its importance in the engineering industry, there are several studies carried out on this subject. Some recent studies focus on the development of unsteady disturbances. In the present work, the evolution of unsteady disturbances is studied through the Direct Numerical Simulation (DNS). The unsteady disturbances are inserting through suction and blowing strip. Preliminary results indicate that the spanwise wavelength has a great influence on the evolution of Görtler vortices. And also that the growth rate reduces with the increase of disturbance frequency.
Keywords
Unsteady Disturbance, Görtler vortices, direct numerical simulation, Non-linear analysis, spanwise wavelength
