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7 Jul 2004: 2. The Experiments. [3] To test these ideas we conducted a series of experi-ments in a Perspex tank with internal horizontal dimensionsof 2 cm by 30 cm, and a depth ... ballotini) requires that the volume of compacted ballotiniin the middle layer,

9 Mar 2004: Thus, formally, the head reacts to thedensity difference at the middle of its height, which is larger than zero (and henceinduces motion) even in the extreme case when ρc = ρb ... 2001). The objectives are (a) to test the ability of the numerical

9 Mar 2004: Some test cases were also run with a direct solver for theblock tri-diagonal system. ... other runs with small C, as an additional test of the predictivepower of the numerical code and the SW approximation.

10 Jun 2004: In the first experiment, three concentric zones were established, consistingof an inner cylinder of non-dyed particles, a middle ring of dyed particles and anouter ring of non-dyed particles. ... A test of anytheoretical model to describe column collapse

9 Mar 2004: After this time the Reynolds number of the current was also too small for theabove theory to be appropriate.) It was thus impossible for us to test robustly bothof the terms