Density Current is formed when a fluid with heavier density than the surrounding fluid flows down an inclined bed. These types of flows are common in nature and can be produced by; salinity, temperature inhomogeneities, or suspended particles of silt and clay. Driven by the density difference between inflow and clear water in reservoirs, density current plunges clear water and moves towards a d...

This paper addresses entropy generation in the flow of an electrically-conducting couple stress nanofluid through a vertical porous channel subjected to constant heat flux. By using the Buongiorno model, equations for momentum, energy, and nanofluid concentration are modelled, solved using homotopy analysis and furthermore, solved numerically. The variations of significant fluid parameters with...

We present a modified k-ε model with set of wall-functions suitable for reconstruction sensible heat and momentum fluxes from the observations data (e.g., surface temperature evolution during diurnal cycle). The modification takes into account stability buoyancy effects in Reynolds stress parametrization which affects turbulence production turbulent flux. single-cell single-column versions are ...

We use well-resolved numerical simulations to study the combined effects of buoyancy, pressure-driven shear and rotation on melt rate morphology a layer pure solid overlying its liquid phase in three dimensions at Rayleigh number $Ra=1.25\times 10^5$ . During thermal convection, we find that melting varies non-monotonically with strength imposed flow. In absence rotation, depending whether buoy...

BACKGROUND Carbon storage in deep saline reservoirs has the potential to lower the amount of CO2 emitted to the atmosphere and to mitigate global warming. Leakage back to the atmosphere through abandoned wells and along faults would reduce the efficiency of carbon storage, possibly leading to health and ecological hazards at the ground surface, and possibly impacting water quality of near-surfa...

In this paper, an idealized, high-resolution simulation of a gradually forced transition from shallow, nonprecipitating to deep, precipitating cumulus convection is described; how the cloud and transport statistics evolve as the convection deepens is explored; and the collected statistics are used to evaluate assumptions in current cumulus schemes. The statistical analysis methodologies that ar...

Owing to the larger thermal expansion coefficient at higher temperatures, more buoyancy is put into the ocean by heating than is removed by cooling at low temperatures. The authors show that, even with globally balanced thermal and haline surface forcing at the ocean surface, there is a negative density flux and hence a positive buoyancy flux. As shown by McDougall and Garrett, this must be com...