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3 RESULTS
3.1 Specified 6 and V
Figure 2 shows results for the case G=0.01m/s and V=0.076m/s (700
micron particles): ie, a shear layer with internal angle (2a) of
15° with vortices translating at 0.08m/s, since G=u 0 tana. This
particle fall speed, also 0.0335m/s used later, equals that of
the particles used in the experimental studies detailed in
chapters 3 and 4. The axes in the parameter space shown in the
figure represent initial values assigned to A (A0 ) and R (R 0 ) .
The inset sketches show a dotted outline of the vortex (tip speed
A0R 0 ) . Also shown is the particle trajectory relative to the
centre of the vortex. As illustrated in figure 2, for any value
of R 0 , (say 0.02m), there will be a range of A 0 (AL