Eventos Anais de eventos
EPTT 2024
14th Spring School on Transition and Turbulence
STUDY OF NON-NEWTONIAN FLUID FLOW STABILITY MODELED BY LPTT
Submission Author:
Andreza Beatriz , SP
Co-Authors:
Andreza Beatriz, Leandro Franco de Souza
Presenter: Andreza Beatriz
doi://10.26678/ABCM.EPTT2024.EPT24-0017
Abstract
The influence of elasticity on the inertial flows of viscoelastic fluids is not yet completely understood, with research underway to better understand the mechanisms involved. This knowledge is crucial for practical applications in industrial processes and materials development. This study investigates the laminar-turbulent transition, focusing on Tollmien-Schlichting wave convection in a two-dimensional incompressible Poiseuille flow for a viscoelastic fluid, using the linear Phan-Thien Tanner (PTT) constitutive equations. The Navier-Stokes equations and the LPTT constitutive equations are solved with high-order compact finite difference methods. Numerical simulations will be carried out varying the dimensionless parameters to compare the distribution of extra stress tensors in flows between parallel fluid plates modeled by LPTT.
Keywords
Laminar-turbulent transition, viscoelastic fluids, PTT Model, Flow Stability, Linear stability theory
