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MOVIES
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MACROSCALE MODELING

Optimal riser design for a steel hammer casting

This movie compares the solidification path in a steel hammer casting, using the original and optimized designs for the riser. The optimal design eliminates the isolated liquid pocket inside the casting near the end of solidification. (20 Mb) Contributed by Jon Dantzig dantzig@illinois.edu

Ga Melting: No Upwinding

This movie shows the computed streamlines (left) and temperatures (right) for the melting of Ga. Natural convection produces a clockwise flow, which becomes unstable with respect to the formation of multiple cells within the liquid. Reference: J. A. Dantzig, "Modeling of Liquid-Solid Phase Changes with Melt Convection", International Journal of Numerical Methods in Engineering, 28:1769-1785 (1989). Contributed by Jon Dantzig dantzig@illinois.edu

Ga Melting: With Upwinding

This movie also shows the computed streamlines (left) and temperatures (right) for the melting of Ga. Natural convection produces a clockwise flow, which becomes unstable with respect to the formation of multiple cells within the liquid. In this case, the numerical scheme includes upwinding, which introduces some artificial diffusion, suppressing some of the fine structure of the convection patterns. Reference: J. A. Dantzig, "Modeling of Liquid-Solid Phase Changes with Melt Convection", International Journal of Numerical Methods in Engineering, 28:1769-1785 (1989). Contributed by Jon Dantzig dantzig@illinois.edu

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