The importance of thermal radiation in physical problems increases as the temperature is raised. At moderate temperatures, the role of the radiation is primarily one of transporting energy by radiative process, while at higher temperature, the energy and momentum densities of the radiation field may become comparable to or even dominate the corresponding field quantities. In radiation hydrodynamics, due to the presence of radiation, the classical "material" flow has to be coupled with radiation which is an assembly of photons (the photons are massless particles traveling at the speed of...

Two-phase flows or multi-phase flows are important in many industrialapplications, for instance, in aerospace, chemical engineering, micro-technology and so on. They have attracted studies from many engineers, geophysicists and astrophysicists. Classically, the fluids, which are macroscopically immiscible, are assumed to be separated by a sharp interface. But, in order to describe topological transitions, such as droplet formation, coalescence of several droplet or droplet breakup, we need to take into account a partial mixing on a small length scale in the models, which is called the...