Poster Session

Onset of thermal instability of a non-Newtonian fluid in a two-layer system

Chen YIN
Nanjing University of Aeronautics and Astronautics
Peoples Rep of China
Co-Author(s):    Chen Yin
The onset of thermal convection in a two-layer system composed of a fluid layer overlying a porous medium saturated with a non-Newtonian fluid heated from below is studied in the paper. The neutral curves are observed to be bi-modal in the porous-fluid system. The ratio of the depth of the fluid layer to that of the porous medium is found to be a significant parameter to dominate the instability patterns of the two-layer system. For the non-Newtonian fluids, the oscillatory convection is also investigated as well as the stationary convection. The effects of different parameters on both of convection are investigated in detail.