Glass shape and especially his open aperture is suspected to play an important role as concerns the kinetics of CO2 and flavor release during champagne tasting. In recent years, much interest has been devoted to depict each and every parameter involved in the release of gaseous CO2 from glasses poured with champagne. One cannot understand the bubbling and aromatic exhalation events in champagne...

Effect of interparticle force on the hydrodynamics of gas-solid fluidized beds was investigated using the combined method of computational fluid dynamics and discrete element method (CFD-DEM). The cohesive force between particles was considered to follow the van der Waals equation form. The model was validated by experimental results from literature in terms of bed voidage distribution and Eule...

Two-phase flow regimes are affected by conduit position, alignment, geometry, flow direction, physical characteristics, and flow rate of each phase as well as the heat flux toward the boundaries. Due to the importance of two-phase flow, numerous regimes have been identified. The first step in studying micro-bubble formation inside a venturi tube is to recognize the type of flow regimes. In this...

The self-assembly of gold micropetals and microfluidic control using their photothermal properties are demonstrated experimentally in this work. Gold fabricated on a glass substrate the shadow-sphere lithography technique. Each micropetal consists two areas with thin films different thicknesses resulting an inhomogeneous optical absorption distribution. property results generation water vapor m...

a modified model has been analytically developed to describe the induction time of an elliptic air bubble in contact with an elliptic hydrophobic oil droplet. the role of hydrophobicity was revealed in the slippage of liquid over the surfaces of bubble and droplet. in this condition, the analytical relationships for pressure distribution and consequently hydrodynamic resistance force through th...

The dynamics of hydrogen bubbles produced by water electrolysis in an acidic electrolyte is studied using electrochemical and optical methods. A defined cyclic modulation the electric potential applied at a microelectrode to produce pairs interacting H $_2$ controlled manner. Three scenarios interactions are identified systematically. most prominent one consists sudden reversal motion first det...

We give a diagrammatic variant of Haken’s normal surface theory, which relies only on a knot diagram and not on additional structures such as a triangulation. The variables are normal arcs rather than normal discs. The crucial ingredient is Menasco’s crossing bubble technique. We demonstrate an unknot recognition algorithm utilizing these techniques.

Reliable estimation of the porous membranes neck-pore size distribution (NPSD) is the key element in the design and operation of all membrane separation processes. In this paper, a new approach is presented for reliable of NPSD of porous membranes using wet flow-state bubble point test data. For this purpose, a robust method based on the linear regularization theory is developed to extract NPSD...