Foam injection is becoming a standard conditioning agent when tunnelling with an earth-pressure balanced shield, resulting in an increasing interest in this technique. The technique is mostly based on empirical rules and experience. To be able to determine what foam and how may foam has to be injected for different soils, it is necessary to know the mechanical parameters of the foam-water-soil ...

Abstract Process impairing foam formation occurs regularly in batch distillation devices of the spirit industry. It negatively influences process and product quality. Up to now, such foam-related problems have not been focus scientific investigations. This study aimed at preventing formations by adapting thermal energy input fruit grain mash distillations larger scale distillations. The results...

Since 2001 children in French primary schools have learnt how to make litres of whipped egg white from a single egg, one culinary hand whisk... and their brains [1]. Obviously, the readers of this journal cannot make less! Such a large volume of foam is not too surprising if one considers the content of the whipped egg whites. In short, they are made of water, proteins and air. If the volume st...

This study presents a method to measure the void fraction in presence of stratified three-phase flow with an opaque fluid like foam. The commonly used resistive probes, which were successfully applied for air-water flows, fail detecting liquid/foam interface due variable conductivity To overcome this problem, new optical was developed. A probe consisting steel rod covered red vinyl plastic blac...

The research last year consisted of three parts: A. Microwave emission and scattering of foam based on Monte Carlo simulations of dense media using the fcc structures and realistic Lord Kelvin’s Tetrakaidecahedron Model of minimal contact area; B. Polarimetric passive microwave remote sensing of wind vectors with foam-covered, rough ocean surfaces; C. Brightness temperature of ocean with wind b...

Application of foam in EOR, increases macroscopic sweep efficiency via awesome increscent of mobility control. Macroscopic manifestation of foam application performance in porous media is complex process that involves several interacting microscopic foam events. Stability as an important factor in foam injection within large reservoirs, depends on several variables including oil saturation, con...

Conduct an analysis of scientific periodicals regarding the use and improvement fire extinguishing efficiency compression foam. The work was carried out on basis periodicals, experimental studies scientists from European Union, USA, China other countries, results which were presented in publications, conferences reports. Conclusions. An publications devoted to foam firefighting increasing its f...

A new method is developed to measure the contact angle of air bubbles attached to an air-water interface. The measurements made from the microscopic interference pattern (Newton rings), which are obtained by viewing the bubble in reflected light, are used in conjunction with the solutions of the Laplace equations to the fluid interfaces to obtain the contact angle of the film. Measurements made...

A best evidence topic in cardiothoracic surgery was written according to a structured protocol. The question addressed was whether there is any benefit to the use of carbon dioxide (CO(2)) field flooding techniques in open heart surgery in order to reduce post-operative gaseous emboli. Altogether 103 papers were found using the reported search, of which 3 presented the best evidence to answer t...

aluminum foams are a novel branch of advanced materials with superior properties. sandwich structures with aluminum foam core are good energy absorbers. in this paper, mechanical properties and energy absorption of aluminum foam sandwich panels subjected to quasi-static perforation tests with conical-nosed indenter were investigated experimentally. for this purpose sandwich panels consisting of...