The allocation problem of rewards/costs is a basic question for players namely individuals and companies that planning cooperation under uncertainty. The involvement uncertainty in cooperative game theory motivated by the real world where noise observation experimental design, incomplete information further vagueness preference structures decision-making play an imp...

In an e!ort to establish benchmarks for the application of the lattice Boltzmann method to bubbly #ow simulations, we compute bubbles in periodic boxes as a function of the EoK tvoK s and Morton numbers and compare the results with established empirical correlations. ( 1999 Elsevier Science Ltd. All rights reserved.

Oscillations of magma in volcanic conduits are thought to be the source of certain seismic and infrasonic signals observed near active volcanoes. However, the multiphase and stratified nature of magma within the conduit complicates the calculation of resonant modes that is required to interpret observations. Here we present a linearized mathematical framework to describe small-amplitude oscilla...

The theory of the acoustics of dilute bubbly liquids is reviewed, and the dispersion relation is modified by including the effect of liquid compressibility on the natural frequency of the bubbles. The modified theory is shown to more accurately predict the trend in measured attenuation of ultrasonic waves. The model limitations associated with such high-frequency waves are discussed.

Pneumatosis cystoides intestinalis is a rare gastrointestinal complication in the course of connective tissue diseases, especially in scleroderma, that can lead to pneumoperitoneum or obstruction. Findings on plain radiography may reveal radiolucent linear or bubbly circular air bubbles in the bowel wall, with or without free gas accumulation in the peritoneal cavity. Treatment of pneumatosis c...

Using a newly developed multiple scattering scheme, we calculate band structure and transmission properties for acoustic waves propagating in bubbly water. We prove that the multiple scattering effects are responsible for the creation of wide gaps in the transmission even in the presence of strong positional and size disorder.

Object-oriented frameworks are suitable tools to support simulation models of different kinds of collective processes. Software objects, called agents, can perform autonomous tasks, perceiving and reacting to external stimuli, resembling in their way the behavior of fluid particles interacting with the sorrounding environment. In this article, the multiagent framework BUBBLE, implemented in Jav...

We report foam coarsening studies which were performed in the International Space Station (ISS) to suppress drainage due gravity. Foams and bubbly liquids with controlled liquid fractions φ between...

The problem of predicting the moments of the distribution of bubble radius in bubbly flows is considered. The particular case where bubble oscillations occur due to a rapid (impulsive or step change) change in pressure is analyzed, and it is mathematically shown that in this case, inviscid bubble oscillations reach a stationary statistical equilibrium, whereby phase cancellations among bubbles ...

In this paper, modelling gas–liquid bubbly flows is achieved by the introduction of a population balance equation combined with the three-dimensional two-fluid model. For gas–liquid bubbly flows without heat and mass transfer, an average bubble number density transport equation has been incorporated in the commercial code CFX5.7 to better describe the temporal and spatial evolution of the geome...