Biomedical Engineering Reference
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(a)
(b)
FIGURE 10.14
Release of nutrient from a solid aggregate (a) versus the same from a porous
one (b) with a porosity of 0.993 and
Re
= 10. In (a) image, initially a maximum
concentration is given at the aggregates surface, which is redistributed with
time. In (b), however, the initial maximum concentration covers the entire
aggregates interior (the entire sphere is fully red at time
t
= 0, having a maxi-
mum concentration). From left to the right, the nondimensional times plotted
are 400, 1,000, 2,000, and 3,000, respectively. As can be seen from the figure,
the mechanism of concentration release is entirely different in both cases (Liu
and Khalili 2008, 2010b).
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