Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
COHERENT STRUCTURES IN NON-NEWTONIAN POWER LAW FLUIDS IN RECTANGULAR CHANNELS
Submission Author:
Juliana Loureiro , RJ , Brazil
Co-Authors:
Cristian Mauricio Potosi Rosero, Leonardo Jose Castellanos Gonzalez, Juliana Loureiro
Presenter: Cristian Mauricio Potosi Rosero
doi://10.26678/ABCM.COBEM2019.COB2019-1568
Abstract
This work applies a method to identify very large scale motions in Newtonian and Non-Newtonian turbulent flows. Three concentrations of Carboxymethyl Cellullose (CMC) were used to simulate the behavior of Non-Newtonian fluids. The characteristics of the flow were measured through a Stereoscopic Particle Image Velocimetry in a rectangular channel section. Information about streamwise velocity, Reynolds stresses and turbulent kinetic energy profiles are presented subsequently. In particular, the reconstruction of large scale motions, also known as coherent structures, is performed. These results are of substantial importance to the understanding of the turbulence problem and the changes in the boundary layer morphology.
Keywords
Coherent Structures, Non Newtonian Fluids, Boundary Layer
