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EPTT 2024
14th Spring School on Transition and Turbulence
STABILITY ANALYSIS OF OLDROYD-B AND GIESEKUS FLUIDS JET FLOW: LST AND DNS.
Submission Author:
Rafael de Lima Sterza , São Paulo
Co-Authors:
Rafael de Lima Sterza, Leandro Franco de Souza, Analice Costacurta Brandi, Marcio Teixeira de Mendonca
Presenter: Rafael de Lima Sterza
doi://10.26678/ABCM.EPTT2024.EPT24-0028
Abstract
Using approaches from Linear Stability Theory and Direct Numerical Simulation, this article compares the stability properties of jet flows utilizing Oldroyd-B and Giesekus fluids. The purpose of the study is to clarify how viscoelasticity affects fluid jet stability behavior, which is a feature of many industrial and natural processes. Additionally, the stability properties of jet flows involving Oldroyd-B and Giesekus fluids will be compared in this study. The results section presents the stability characteristics obtained through the LST and DNS approaches for different flow parameters and rheological properties of the fluids. By using the two fluid models, the comparison highlights the disparities in their stability behavior and clarifies the function of viscoelasticity in jet flow stability.
Keywords
Jet flow, Oldroyd-B fluid, Giesekus fluid, Linear stability theory, direct numerical simulation
