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Figure 4
Estimated velocity fields for two metal foaming samples at different expansion stages: (left) foaming in a wedge-shaped mold at (a) 0 s, (b) 20 s, (c) 45 s and (d) 65 s; (right) foaming in an L-shaped mold at (f) 0 s, (g) 25 s, (h) 50 s, (i) 60 s. Plots (e) and (j) show integral coalescence distributions. The vertical coalescence event profiles reveal a lower events fraction in the bottom foam layers, where film thinning is slowed down by a liquid material flow from upper layers. The non-uniform horizontal event distributions can be explained by frictional forces between the upward-moving foam flows and steel molds.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 19| Part 4| May 2012| Pages 483-491
doi:10.1107/S0909049512015099
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