Download 6th Int'l Conference on Numerical Methods in Fluid Dynamics by H. Cabannes, M. Holt, V. V. Rusanov PDF

By H. Cabannes, M. Holt, V. V. Rusanov

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Extra resources for 6th Int'l Conference on Numerical Methods in Fluid Dynamics

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A) b) Fig. 42wt%C with Marangoni and EM forces; time evolution of all characteristic numbers for a) P = 1550 W; b) P = 2000 W L Chapter 0 Executive summary P = 2000 W as two examples for extreme transient behaviour. The representation of the four char- acteristic numbers in one plot demonstrates the strongly changing pool shape. 5 s for P = 2000 W. Both effects as well as the complex interaction of different convection cells can be studied in the temperature and stream function plots in Fig. 45.

21; Tliq = 1801 K, Tsol = 1766 K; the pool shapes marked with (V) are not realistic, because for them the formation of a vapour capillary is expected. 5 mm (V) rlaser = 1 mm (V) rlaser = 3 mm rlaser = 5 mm rlaser = 7 mm Fig. 1wt%C with P = 2000 W and negative MC –1⋅10 N m K ; scale cf. Fig. 21; Tliq = 1801 K, Tsol = 1766 K; the pool shapes marked with (V) are not realistic, because for them the formation of a vapour capillary is expected. -4 -1 -1 a) b) d) c) Fig. 5 s welding time. -4 -1 -1 -4 -1 -1 XXXVIII Chapter 0 Executive summary experimental observations.

Observed that first the pool radius grows much quicker than the depth, forming a flat shape. 6 s. 0 s vmax = 0,25 m/s a) b) Fig. 6 s; Left: Temperatures, scale cf. Fig. 34; Right: Streamlines; the scales of different time steps are not comparable; b) time development of all characteristic numbers; R3s = 0,0044 m to develop W-shape behaviour and later turns into a V-shape. Fig. 43 shows two calculations with powers within the critical range. Both start developing a W-shape configuration but end up with different pool shape types.

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