Omar Matar

TL;DR: The dynamics and stability of thin liquid films have fascinated scientists over many decades: the observations of regular wave patterns in film flows along a windowpane or along guttering, the patterning of dewetting droplets, and the fingering of viscous flows down a slope are all examples that are familiar in daily life.

TL;DR: Fluorosurfactants are the most effective compounds to lower the surface tension of aqueous solutions, but their wetting properties as related to low energy hydrocarbon solids are inferior to hydrocarbon trisiloxane surfactants, although the latter demonstrate higher surface tension in aQueous solutions.

TL;DR: In this article, the stability of the interface between two thin leaky dielectric liquid layers bounded between two flat electrodes is considered and a coupled system of evolution equations is derived for the interfacial location and charge density using lubrication theory.

TL;DR: In this article, the authors investigated the existence, development and translation of disturbance waves in upward, gas-liquid annular flows. And they found that the frequency of occurrence of the disturbance waves first increases away from the inlet as these waves form, reaches a maximum at a length between 7.5 and 15 pipe diameters, and then decreases again.

TL;DR: In this article, an advanced optical laser-based measurement technique, namely Planar Laser-Induced Fluorescence (PLIF), was used for the visualization of the annular flow over a range of liquid Reynolds numbers and gas Reynolds numbers.