We study a reaction-diffusion problem with a free boundary governing the evolution of a foam. We show that the problem is globaly well-posed and that the solution converges, when the viscosity tends to zero to the solution of an initial-boundary value problem for Burgers equation.

We seek to understand and predict the evolution of the brightness temperature (four Stokes parameters) of wind­ driven foam-covered ocean surfaces. The correlation of polarimetric variation is studied as function of the medium state, modeled as a rough surface (ocean) overlayed by a random medium (foam). Many independent results are obtain by using a wide variety of electromagnetic techniques, ...

Lung resection for benign diseases in infants is an extremely difficult thoracic surgical decision. Paediatric patients with drainage resistant pneumothorax and/or pneumatocele due to destroyed lung pose an even more challenging task. We describe a parenchyma sparing method using a sealant-haemostatic complex foam (Tachosyl) developed originally for application in liver and kidney surgery. Both...

Few reports have described the use of endoscopic vacuum therapy (EVT) for duodenal defects [1–4]. We treated a complicated duodenal leak with EVT using the pull-through technique with a new type of open-pore polyurethanefoam drain (OPD) [5] and a novel type of open-pore film drain (OFD). Construction of an OFD is shown in ▶Video1. First the distal ends of two drainage tubes (Ventrol; 12–18Fr × ...

application of modern irrigation and drainage canals for efficient use of water resources is necessary. thus , identifying the factors influencing farmers ’ attitudes toward participation in irrigation and drainage projects (idp) is essential. the purpose of this study is to identify factors affecting attitude toward participation in idp in syakh darenjan, fars province , iran. stratified rando...

application of archie equation in carbonate reservoirs is not easy due to high dependence of its parameters on carbonate characteristics. carbonates are very heterogeneous in nature and hydrocarbon reserve estimation in these reservoirs of mostly oil-wet and intermediate-wet is highly influenced by the input values of saturation exponent. to our knowledge, non representative oils have been used...

Gel foam has the advantages of gel and shows good prospects for applications in fields fire prevention extinguishing. Rheology a significant impact on application foam, but there is little related research. In present study, hydrophilic silica nanoparticles (NPs) water-soluble polymer xanthan gum (XG) were combined with fluorocarbon surfactant (FS-50) hydrocarbon (APG0810) to create foam. The f...

Since it is low in cost and toxicity has good biodegradability, gas-liquid-foam three-phase flow been widely used industrial fire protection. Due to the different characteristics of gas, liquid, foam, liquid precipitation liable occur under static conditions, resulting unstable performance mixture. To improve extinguishing efficiency, great significance study separation process gas-liquid-foam....

In the present work we have studied the characteristics of propylene glycol alginates (PGA) adsorption at the air-water interface and the viscoelastic properties of the films in relation to its foaming properties. To evaluate the effect of the degree of PGA esterification and viscosity, different commercial samples were studied--Kelcoloid O (KO), Kelcoloid LVF (KLVF) and Manucol ester (MAN). Th...