Double diffusive staircases are experimentally investigated in a fluid layer with stabilizing temperature gradient and destabilizing of ion concentration. Gradients concentration maintained steady state within an electrochemical system. Staircases observed even if the density stratification is unstable. None previously proposed mechanisms for staircase formation can be recognized experiments. I...

The problem of the evolution double-diffusive convection in a plane layer under action external vibrations is solved numerically. A two-layered system miscible fluids placed vertical fields gravity and linear translational considered. former generator convection: due to difference diffusivity species dissolved, unstably stratified fluid regions are formed layer. Water used as continuous medium....

Variations in temperature and salinity in hypersaline liquid-dominated geothermal systems like the Salton Sea Geothermal System (SSGS) tend to be correlated such that liquid density is relatively constant in the system. The tendency toward small density variations may be due to connectivity with a surrounding regional aquifer at multiple depths in the stratigraphic column. We present numerical ...

Spreading of bacteria in a highly advective, disordered environment is examined. Predictions of super-diffusive spreading for a simplified reaction-diffusion equation are tested. Concentration profiles display anomalous growth and super-diffusive spreading. A perturbation analysis yields a crossover time between diffusive and super-diffusive behavior. The time’s dependence on the convection vel...