Lateral Extrusion for Round to-Triangular Head: Experimental Studies and Three Dimensional Analyses | | Author : U.C. Paltasingh, S.K. Sahoo, P.R. Das, K.C. Nayak, S. Potnuru | | Abstract | Full Text | Abstract : In recent years, applications of integral part instead of assembled part in different industries have been increased. In the present work, an experimental die-punch set-up for lateral extrusion is designed and the process is simulated using finite element method for estimation of load requirement and metal flow patterns. Experimental study has been carried out to find the extrusion load at different geometrical conditions taking lead as the work piece material. The predictions both in extrusion/forging load and the deformed configuration are in good agreement with the experiment qualitatively under different conditions. |
| STUDY OF THE TURBULENT NATURAL CONVECTION INSIDE A DIFFERENTIALLY HEATED SQUARE CAVITY | | Author : Tcheukam-Toko D. , Tientcheu-Nsiéwé M , Mouangue R , Djanna-Koffi F, Kuitche A | | Abstract | Full Text | Abstract : The turbulent natural convection inside a differentially heated square cavity has been studied numerically in this paper. Special attention has been paid for the wall effect on the convection. The turbulent model has been applied a standard κ-ε two equations model and the two-dimensional Reynolds Averaged Navier–Stokes (RANS) equations are discredited with the second order upwind scheme. The SIMPLE algorithm, which is developed using control volumes, is adopted as the numerical procedure. Calculations were performed for a wide variation of Rayleigh number corresponding to different flow. The results reveal that with increasing Rayleigh number, distributions of temperature and velocity show higher values at the wall region of the cavity. Comparison of numerical results with the experimental data available in the literature is satisfactory. |
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