Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Stability Analysis of a Supercritical Fluid in a Porous Medium Heated from Below
Submission Author:
Leonardo Santos de Brito Alves , RJ , Brazil
Co-Authors:
Leandro Santos de Barros, Heitor Herculano de Barros
Presenter: Heitor Herculano de Barros
doi://10.26678/ABCM.ENCIT2016.CIT2016-0307
Abstract
Supercritical fluids have been widely used in industrial applications for the last decades. Once that consists a relatively new area of study, this kind of fluid has been demanded a great amount of dedicated research in areas related to critical phenomena. By other way, hydrodynamic stability analyses is a powerful tool to analise the behavior of given solutions in relation to different parameters of the physical problem. Hydrodynamics of supercritical fluids is particularly interesting because the physical coefficients exhibit singularities which leads to new physical phenomena. Then, this work aim to apply the hydrodynamic stability concepts to study the linear instability of the Darcy-Benard problem. For this, it is considered a porous medium saturated by a supercritical fluid in a parallel plate subject to heat flux from below. A coupled linearized mass, momentum and energy disturbance equations are numerically solved and the graphical results used to support various asymptotic analyses.
Keywords
Supercritical fluid, Over-stability, Porous media, Thermal convection, Darcy model
