Flow and concentration fields in bench scale gas-injected molten steel baths were numerically studied to investigate dependencyof flow structure and mixing characteristics on bath aspect ratio and gas injection rate. The problem was formulated as a two-phase flow on the basis of Euierian approach for both gas and iiquid phase transports.

No abstract

TheJbw and heat lmnsfer in poda& haled and partially cooled cnuities were numericnUy onolyzed. A square enclosure wilh a heoter and a cooler on the vem'cal walls was considered. The size of the heorer and cooler was kept consfont, but the locotions of the heater ond cooler were changed. Using the control volume appronch, a computer pmgmm based on the SIMPLE algorithm wm developed. Computations were carried out to investigatt the effects of the heater ond cooler locahahons on the JluidJbw and heat trmfer. I t was observed thol for a given cooler locotion, the mean Nusselt number increases ar the heoter moves closer to the boaom wall. On the other hand, for a given heater locolion, the meon NweU number incremes as the cooler moues closer to the top horizontal woll. For the problem considered, the marimum meon NusseU number is obtoined when the haler Q slightly above the bmom woll ond the cooler is slightty below the top horirorvol woll. For oll Royleigh numbers considered, the same behovior was observed.