Eventos Anais de eventos
EPTT 2024
14th Spring School on Transition and Turbulence
Linear Stability Analysis of Viscoelastic Boundary Layer Flows
Submission Author:
Beatriz Liara Carreira , SP
Co-Authors:
Beatriz Liara Carreira, Leandro Franco de Souza
Presenter: Beatriz Liara Carreira
doi://10.26678/ABCM.EPTT2024.EPT24-0025
Abstract
Understanding the flow regime, whether laminar or turbulent, is crucial in several scientific and industrial applications, especially in the laminar-turbulent transition process. This phenomenon, often triggered by sources of physical instabilities in the flow, can be observed in the boundary layer, where small amplitude disturbances, such as Tollmien-Schlichting waves, gradually amplify, resulting in the transition to turbulence. Given the importance of the effect of viscosity on the boundary layer and considering that this is also an important property of viscoelastic fluids, investigating and understanding the transition phenomenon in these flows is relevant and essential for several industrial applications. Therefore, the objective of this work is to investigate the hydrodynamic stability in a two-dimensional and isothermal boundary layer flow, considering an incompressible and non-Newtonian fluid represented by the Giesekus viscoelastic model, through the analysis of Tollmien-Schlichting wave convection using the Linear Stability Theory.
Keywords
Laminar-turbulent transition, Linear stability theory, viscoelastic fluid, Boundary Layer
