TY - EJOU
AU - Podolny, A.
AU - Nepomnyashchy, A.
AU - Oron, A.
TI - Rayleigh-Marangoni Instability of Binary Fluids with Small Lewis Number and Nano-Fluids in the Presence of the Soret Effect
T2 - Fluid Dynamics \& Materials Processing
PY - 2010
VL - 6
IS - 1
SN - 1555-2578
AB - A general model for two-component transport phenomena applicable for both nanofluids and binary solutions is formulated. We investigate a combined long-wave Marangoni and Rayleigh instability of a quiescent state of a binary (nano-) liquid layer with a non-deformable free surface. The layer is heated from below or from above. The concentration gradient is induced due to the Soret effect. A typical behavior of monotonic and oscillatory instability boundaries is examined in the limit of asymptotically small Lewis numbers and poorly conducting boundaries in the two important long-wave domains k~Bi1/2and k~Bi1/4.
KW - nanofluids
KW - Marangoni convection
KW - Rayleigh convection
KW - Soret effect
DO - 10.3970/fdmp.2010.006.013