BY: D R Glynn, FLOWSOLVE, London. Tel: +44 181 944 0940

FOR: Morris Ashby Castings Ltd

In the die-casting process, molten aluminium is forced into the delivery channel from the "shot sleeve", a horizontal cylindrical reservoir. A piston is pushed in at one end and forces the metal out from the other end.
Waves on the metal surface may cause air bubbles to pass into the delivery channel. It is therefore important to understand the motion of the liquid surface.
Model features - 3D transient, free-surface (SEM), compressing grid, cylinder represented by ASAP within a cartesian grid.
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The results are shown in two ways:
(i) Contours on symmetry plane - red is metal, blue is air. Piston is on the right, outlet on the left.
(ii) Liquid surface in isometric view. Piston is at the bottom left, outlet at the top right.
For each of the above, the metal surface is shown at four instants during the transient.
Note that as the aspect ratio changes with compression, the scale of the plots get bigger.

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