Ablation of water drops suspended in asphaltene/heptol solutions due to spontaneous emulsification

Dynamics of spontaneous emulsification

We present a model for spontaneous emulsification resulting from a transiently negative interfacial tension between water and oil regions, which may be achieved under conditions of strong adsorption of surfactant molecules to the interface. While our approach builds on a linear stability analysis, it addresses the essential non-linear coupling of surface growth to the diffusion flux of surfacta...

Apparent slip due to the motion of suspended particles in flows of electrolyte solutions.

We consider pressure-driven flows of electrolyte solutions in small channels or capillaries in which tracer particles are used to probe velocity profiles. Under the assumption that the double layer is thin compared to the channel dimensions, we show that the flow-induced streaming electric field can create an apparent slip velocity for the motion of the particles, even if the flow velocity stil...

Assessment of water quality due to Wolfram mining in Portugal

Water has an important role in creating pollution problems in the mining regimes influencing the surrounding surface environment. The purpose of this study is to make an assessment of groundwater quality in an underground mine site in Portugal with a view of determining the pollution potential of groundwater. In the corresponding surface area of this underground mine, intersec...

Terminal Velocity of Canola Oil, Hexane, and Gasoline Drops Rising in Water due to Buoyancy

Drops, globules of a liquid in another liquid, are extremely important in many natural processes and industrial applications. The purpose of this study was to devise a method to measure the terminal velocity of drops rising in water due to buoyancy, and to compare observed values with the theoretical. Two questions were explored: (1) Do these drops continue to accelerate upward from a depth of ...

Spontaneous Rupture of Uterus in Midtrimester Pregnancy Due to Increased Uterine Pressure with PreviousLaparoscopic Myomectomy