An investigation was conducted to study the reutilization of clear fracturing flowback fluids composed of viscoelastic surfactants (VES) with additives in surfactant flooding, making the process more efficient and cost-effective. The clear fracturing flowback fluids were used as surfactant flooding system with the addition of α-olefin sulfonate (AOS) for enhanced oil recovery (EOR). The interfa...

The physical properties of ionic surfactants are very sensitive to the nature of the counterions. In particular, counterions that have a tendency to adsorb on the surfactant micelle are known to dramatically modify the viscoelastic properties of these solutions through the formation of long wormlike micelles [1, 2, 3, 4]. One extreme limit of an adsorbed counterion is an oppositely charged surf...

The small-deformation behaviour of Newtonian emulsion drops covered with a viscoelastic layer of adsorbed proteins (globular proteins and random coil protein) is investigated in shear flow and compared to emulsions prepared with a low molecular weight surfactant (SDS). Drop deformation experiments are performed with dilute emulsions in the rheometer using light microscopy as well as rheo-SALS [...

While the structure and dynamics of boundary layers on rigid no-slip walls in rotation dominated enclosed flows are still an area of active research, the interactions between rotating or swirling flows with a free surface have received comparatively less attention. For the most part, investigations in this area have been focused on clean free surfaces, which may be treated as stress-free. Howev...

Interpenetrating networks (IPN) consist of two or more networks of different components which are entangled on a molecular scale and cannot be separated without breaking at least one of the networks. They are of great technological interest because they allow the blending of two or more otherwise incompatible properties or functions, and furthermore synergistic effects might arise from the simu...

To model waves, surface flows, and particle dispersion at the air-water interface one needs to know the essential mechanisms affecting the fluid motion at the surface. We show that a thin film (less than 10-nm thick) of adsorbed protein dramatically affects two-dimensional turbulence generated by Faraday waves at the fluid surface. Extremely low concentrations (≈1 ppm) of soluble proteins form ...

There are economic and technical challenges to overcome when increasing resource recovery from low permeability reservoirs. For such reservoirs, the hydraulic fracturing plan with development of clean less expensive fluid plays a vital aspect in meeting energy supply chain. Numerous recent published studies have indicated that research on worm-like micelles (WLMs) based viscoelastic surfactant ...

The distribution of particles in Pickering emulsions can be estimated through a percolation-type approach coupled to the evolution their rheological features with dispersed phase volume fraction ?. behavior water-in-dodecane stabilized hydrophobic silica nanoparticles is addressed. viscosity and elastic modulus are investigated at ? varying from 0.1 0.75. Various models adjusted experimental da...

Cationic surfactantshaving long (C22)mono-unsaturated tailswerestudied inaqueoussolutionscontaining salt using steady and dynamic rheology. The surfactant erucyl bis(hydroxyethyl)methylammonium chloride self-assembles into giant wormlike micelles, giving rise to unusually strong viscoelasticity. Under ambient conditions, the viscosity enhancement due to surfactant exceeds a factor of 107. Some ...