Optical Tweezers Tensiometry: pushing the boundaries

The interfacial tension is a fundamental property of liquid-liquid systems and governs the mixing potential of two immiscible fluids. For two fluids to form a stable mixture, their interfacial tension needs to be very low. Applications of systems with a low interfacial tension find a plethora of applications: for example, in the food industry,...

Investigation of certain physical–chemical features of oil recovery by an optimized alkali–surfactant–foam (ASF) system

The objective of this study is to discover a synergistic effect between foam stability in bulk and micro-emulsion phase behaviour to design a high-performance chemical system for an optimized alkaline–surfactant–foam (ASF) flooding for enhanced oil recovery (EOR). The focus is on the interaction of ASF chemical agents with oil in the presence...

Energy stable finite element schemes and their applications to two-fluid flow problems

We present energy stable finite element schemes for two-fluid problems with interfacial tension. The interface is captured by solving numerically ordinary differential equations and the interface tension is brought in into the weak formulation of the finite element scheme. Some numerical results of rising bubble problems show the robustness and...

Axisymmetric liquid sloshing under low-g conditions: numerical simulations method (-reference manual-)

A mathematical model is presented for the description of axisymmetric three-dimensional transient flow of a viscous liquid in a partially filled cylindrical container under low gravity conditions. The mathematical model consists of the Navier-Stokes equations with either no-slip condition at the solid boundaries, and with the continuity of...

Study on equipment requirements in support of microgravity fluid physics experiments

The study culminates in requirements for facilities and instrumentation of a laboratory supporting microgravity fluid physics experiments and equipment developments. The requirements are based on reviews of candidate areas of experimentation and proposed or actual experiment facilities. Present deficiencies in measurement capabilities or...

Liquid sloshing under low-g conditions: Mathematical model and basic numerical method

In this report a mathematical model is presented which can describe the dynamic behaviour of liquids in partially filled containers under low gravitational conditions. This model will be used for the evaluation of a series of experiments which the NLR has planned to be performed onboard Spacelab. Furthermore, the report contains a description of...