Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session Q34: Stratified Flows and Thermal Instabilities
12:50 PM–3:26 PM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B406
Chair: Colm-Cille Caulfield, University of Cambridge
Abstract ID: BAPS.2018.DFD.Q34.10
Abstract: Q34.00010 : Effect of finite walls thicknesses and thermal conductivities on the Rayleigh convection in a viscoelastic Jeffreys fluid layer*
2:47 PM–3:00 PM
Presenter:
Ildebrando Perez-Reyes
(Universidad Autónoma de Chihuahua)
Authors:
Ildebrando Perez-Reyes
(Universidad Autónoma de Chihuahua)
Luis Antonio Davalos-Orozco
(Universidad Nacional Autonoma de Mexico)
Nestor Gutierrez-Mendez
(Universidad Autónoma de Chihuahua)
Findings are related to more realistic conditions at which the convective motions in the fluid layer set in. These conditions are given by the Rayleigh, the wavenumber and the frequency of oscillation for fixed Prandtl number and fluid properties as the relaxation and retardation times. Convection in the fluid layer was investigated to determine curves of criticality for the Rayleigh number, the wavenumber and the frequency of oscillation against the thermal conductivities ratio (fluid/wall) for walls with small and large thicknesses. The role of the stress relaxation and retardation times is discussed from the point of view of the walls thermal and geometrical properties. Curves of criticality show that steady and oscillatory motions compete to destabilize the fluid layer. More results shall be discussed.
*I. Perez-Reyes would like to thank the financial support from CONACyT through the project Ciencia Basica - 255839.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.Q34.10
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