IMplicit Pressure Explicit Saturation (IMPES) scheme with treating buoyancy and capillary forces is used to solve the two-phase water-CO2 flow problem. In most of the previous studies of the two-phase flow, the buoyancy force term was ignored; however, in the case of liquidgas systems such as water-CO2, the gravity term is very important to express the buoyancy effect. In this paper, we present...

We describe an experimental technique for the production of highly monodisperse emulsions (with minimum achievable polydispersities < 3%). The phase to be dispersed is introduced into a coowing, surfactant laden continuous phase via a tapered capillary. Drops detach from the capillary when the streamwise forces exceed the force due to interfacial tension. Drop size is a function of the capillar...

capillary electrophoresis (ce) with indirect uv detection is an interesting analytical method for the analysis of drugs and pharmaceuticals. good and reproducible capillary quality is needed to develop robust methods and to facilitate method transfer in ce. it is widely accepted that preconditioning procedures are indispensable in capillary electrophoresis in order to achieve reproducibility of...

Capillary adhesion is so remarkable in micro–nano technology that it can seriously influence accuracy and safety. The shapes optimized by dissolution provide a method to weaken or even eliminate capillary adhesion. Based on the experiments of soluble fibers, this work demonstrates process an optimization force, unique geometrical sculpted effectively mechanism elimination relevant stability men...

We study the formation and the free decay of capillary turbulence on the charged surface of liquid hydrogen on the switching on, and off, of a narrowband driving force. It is observed that the decay begins from the high frequency spectral domain of the surface oscillations and is of a quasi-adiabatic character. The characteristic relaxation time of the whole turbulent cascade is close to the vi...

The surface and hydrodynamic forces between individual oil droplets in solution can provide insight into both emulsion stability and processes such as drop coalescence in liquid-liquid extraction. We present the first measurements of the interaction forces between alkane droplets in aqueous solution using atomic force microscopy. The radii of the droplets were well below the capillary lengths f...

The basic principles of atomic force microscopy are discussed. Various deflection sensors are described and compared with each other. A simple theoretical basis of the fundamental forces, such as van der Waals, electrostatic, magnetic, capillary, ionic repulsion and frictional forces, is given and the relevant experimental work is summarized.

The mechanical properties of a suspension can be dramatically altered by adding a small amount of a secondary fluid that is immiscible with the bulk phase. The substantial changes in the strength of these capillary suspensions arise due to the capillary force inducing a percolating particle network. Spatial information on the structure of the particle networks is obtained using confocal microsc...

We have developed a hygromorphic metal oxide actuator using an electrochemical method to produce a superhydrophilic freestanding nano-capillary forest of titanium oxide with a high aspect ratio (~80). This metal oxide film has an inhomogeneous initial gap at the top and bottom surfaces between the tubes due to flexure during fabrication. The actuation mechanism is as follows. First, when a drop...

We present a generic way of forming various complex polymeric microstructures using physical self-organization and capillary dynamics. A simple lithographic tool called capillary force lithography is utilized for this purpose, in which the pattern formation is driven by capillary force, not involving any external force or modification. In this method, a patterned polydimethylsiloxane mold is pl...