鋼処理操作における 2, 3 の乱流流れの問題

概要

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Through the use of turbulent flow theory a mathematical representation is proposed for a range of steel processing operations where turbulent mixing plays a major role in determining the efficiency of the process. The resultant differential equations were solved numerically, using a digital computer. The examples discussed in the paper include mixing in argon-stirred ladles, the flow patterns in the liquid pool of continuous casting systems, the flow field induced by an electromagnetic force field in continuous casting and flow patterns in rimming ingots. The computed results indicate that velocities as high as 30cm/s may be found in these systems and that the eddy diffusivities may have values as high as 500 cm^2/s. The computed results were found to be in reasonable semi-quantitative and in some cases quantitative agreements with results of experimental model tests. While the computer requirements are quite substantial, some 5-10 minutes on a CDC 6400 (state university of New York at Buffalo), the approach outline here seems attractive because it provides a much improved insight into the structure of the flow field and a more solid basis for further studies of inclusion coalescence, inclusion entrapment, electromagnetic stirring, and mass transfer in steel processing.
社団法人日本鉄鋼協会の論文
1975-06-01