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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Effects of Turbulence from Submerged Entry Nozzle During the Solidification Process of Continuous Castings

Get access (open in a dialog) DOI: 10.1615/IHTC12.2170
6 pages

Sinopsis

Prandtl mixing length theory with average heat capacity method was successfully implemented to model turbulent plane submerged entry nozzle continuous casting (CC) process. The results from the current method compared well with published analytical results and experimental data. This method features the simplicity of zero equation model along with ease of maintaining the time step increment using average heat capacity method. A series of simulations were investigated to study the effects of submergence depth (ys*), inlet speed (Pe), superheat (Θo), mold cooling rate (Bim)and post mold cooling rate (Bip)on the process characteristics and were presented in terms of viscosity contours, location and slope of the solidification front, velocity vectors and local heat flux. The results obtained were compared with the non-submerged entry nozzle type CC process. The current studies reveal that ys*, Pe, and Θo have significant effect on the performance and productivity of the cast material. The submergence depth was found to be desirable to reduce the turbulence at the free surface and hence reduce entrapment of the mold flux in the cast product. The effects of ys* were found to be diminishing with increasing Pe. Bim in submerged entry nozzle CC process had dominating effects when compared to nonsubmerged entry nozzle CC process.