Abstract
Computational Fluid Dynamics (CFD) is very powerful and effective. However, in order to master CFD effectively, specialized knowledge and technique and long computing time and high cost are still necessary. On the other hand, detailed and large-scale computing models are not always necessary in engineering. In most cases, analytical results are required not in detailed but in a short of term, therefore simplified CFD method is expected in engineering. In this paper, expecting for development of simplified CFD method, existing engineering problems about CFD of some steel making plant and process are presented.