Izviren kombiniran večfazni model mešalne faze eksplozije pare
An original combined multiphase model of the steam-explosion premixing phase

english
slovenian

2002

volume 48, issue 8

Univerza v Ljubljani, Fakulteta za strojništvo

In multiphase flow, different distributions can occur that cannot be adequately modeled with just free-surface models or with just multiphase models. Such a distribution of phases occurs for example, in isothermal steam-explosion premixing experiments, where dispersed spheres penetrate the water and the water-air surface remains sharp. A common practice when modeling isothermal premixing experiments is to treat all three phases involved - the water, the air and the spheres phase - equally, with multiphase flow models. In this way the water-air surface is treated as a dispersed flow of bubbles in water or droplets in air, which is a physically incorrect picture and because of very strong momentum-coupling terms also numerically not an easily solvable problem. Therefore, we decided to develop an original, combined multiphase model, where the spheres are treated, as is usual with a multiphase flow model, whereas the water-air surface is treated with a free-surface model. ...

16.09.2009