Modeling of droplet generation in a top blowing steelmaking process

Quantification of metal droplets ejected due to impinging gas jet on the surface of liquid metal is an important parameter for the understanding and for the modeling of the refining kinetics of reactions in slag-metal emulsion zone. In the present work, a numerical study has been carried out to critically examine the applicability of droplet generation rate correlation previously proposed by Subagyo et al. on the basis of dimensionless blowing number (N B). The blowing number was re-evaluated at the impingement point of jet with taking into account the temperature effect of change in density and velocity of the gas jet. The result obtained from the work shows that the modified blowing number N B,T at the furnace temperature of 1873 K (1600 °C) is approximately double in magnitude compared to N B calculated by Subagyo and co-workers. When N B,T has been employed to the Subagyo’s empirical correlation for droplet generation, a wide mismatch is observed between the experimental data obtained from cold model and hot model experiments. The reason for this large deviation has been investigated in the current study, and a theoretical approach to estimate the droplet generation rate has been proposed. The suitability of the proposed model has been tested by numerically calculating the amount of metals in slag. The study shows that the weight of metals in emulsion falls in the range of 0 to 21 wt pct of hot metal weight when droplet generation rate has been calculated at ambient furnace temperature of 1873 K (1600 °C)

Analysis of shared heritability in common disorders of the brain

Paroxysmal Cerebral Disorder

Resonant Clumping and Substructure in Galactic Discs

We describe a new method for analysing N-body simulations. The method makes a blind search for resonant orbits by making use of the fact that resonant orbits will return to some previously occupied region of phase space. An application of this method is made to the N-body simulation of Shen et al. (2010). The simulation is host to a strong and persistent central bar that drives resonances and angular momentum exchange, even in the outer parts of the disc. We deconstruct the barred disc into it's constituent resonant orbit families. We then study the contribution of each orbit family to the kinematic landscape around the disc