The aim of this communication is to analyse the thermal mixed convection thresholds and the linear characteristics of convective instability for viscoelastic fluids saturating a porous medium, by taking into account viscous dissipation. Thus, the present contribution may be considered as an extension of the study of Prats problem for viscoelastic fluids, and also an extension the existing analyses on the effects of viscous dissipation in Newtonian fluids. The Darcy-Oldroyd-B rheology is assumed, leading to a modified form of the Darcy- Boussinesq governing equations for buoyant flow in a homogeneous and isotropic porous medium.
L. S. de B. Alves, A. Barletta, S. C. Hirata, M. N. Ouarzazi (2013). Effects of viscous dissipation on convective instability of viscoelastic mixed convection flows in porous media. Cluj-Napoca : Presa Universitara Clujeana.
Effects of viscous dissipation on convective instability of viscoelastic mixed convection flows in porous media
BARLETTA, ANTONIO;
2013
Abstract
The aim of this communication is to analyse the thermal mixed convection thresholds and the linear characteristics of convective instability for viscoelastic fluids saturating a porous medium, by taking into account viscous dissipation. Thus, the present contribution may be considered as an extension of the study of Prats problem for viscoelastic fluids, and also an extension the existing analyses on the effects of viscous dissipation in Newtonian fluids. The Darcy-Oldroyd-B rheology is assumed, leading to a modified form of the Darcy- Boussinesq governing equations for buoyant flow in a homogeneous and isotropic porous medium.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
