We have proposed a static model, a dynamical model and a modified dynamical model of a geyser induced by inflow of gas based on observation and model experiments of it and have also proposed a combined model combining above two models. And numerical simulations of the modified dynamical model or the combined model reappear spouting dynamics of a geyser induced by inflow of gas and it becomes po...

We modified further our extended dynamic model of a geyser induced by an inflow of gas, by taking into consideration the effects during spouting of an elbow shape, pairs of sudden expansions and contractions, and repeats of this shape in an underground watercourse. Through numerical simulations of this extended dynamic model, we see that a large number of sudden expansions and contractions or a...

Bed symmetry has been analysed in fountain confined conical spouted beds operating with fine particles. Thus, vertical particle velocities and the spout shape have determined a wide range of spouting air bed configurations. is widely accepted without draft tubes or nonporous ones, but this not case when open-sided are used. radial velocity profiles differ depending on cross-sectional angular pl...

ammonium perchlorate particles have been dried in a laboratory spouted bed dryer (screen-bottomed type) which is categorized as a fluidized bed dryer. the solid particles obtained in this process of drying were semi-porous and known as the group d of geldart classification. the variations of moisture content with resident time, the effects of bed height on the pressure drop, and the influence o...

The performance of both fluidized and spouted bed reactors in the pyrolysis waste plastics is conditioned by particle agglomeration phenomena, which worsens quality gas–solid contact eventually lead to defluidization. objective this work determine optimum conditions for stable operation (without defluidization) a bench scale plant fitted with fountain confined conical reactor equipped nonporous...

In this paper, some results are provided for minimum time roll about velocity vector maneuvering with thrust-vectoring and aerodynamic control in effect. The mathematical model for attitude motions of the aircraft is developed. First order necessary conditions for optimality using Pontryagen principle is applied, and the existence of an extreme family of solutions for the maneuver is shown. Mul...