The linear stability of fluid a saturated porous channel heated from below is studied. The stability analysis consists in finding the critical values that identify the threshold conditions for the onset of convective instability. The two dimensional behaviour of the fluid saturated porous medium is simulated experimentally by employing a Hele-Shaw cell of length L = 80 cm and height H = 4 cm.Preliminary results show that the convective instability arises for values of Rayleigh number compatible with those obtained by the numerical analysis.

RAYLEIGH-BÉNARD INSTABILITY OF THE POWER-LAW FLUID FLOW IN A POROUS MEDIUM: NUMERICAL AND EXPERIMENTAL ANALYSIS

VALIANI, Alessandro
2017

Abstract

The linear stability of fluid a saturated porous channel heated from below is studied. The stability analysis consists in finding the critical values that identify the threshold conditions for the onset of convective instability. The two dimensional behaviour of the fluid saturated porous medium is simulated experimentally by employing a Hele-Shaw cell of length L = 80 cm and height H = 4 cm.Preliminary results show that the convective instability arises for values of Rayleigh number compatible with those obtained by the numerical analysis.
Porous Medium; Thermal Instability; Non-Newtonian fluid; Hele-Shaw cell; Particle Image Velocimetry (PIV)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2370068
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