The
effect of particle size on the porosity of garri was studied and analysed using
the sieving method and porosimetry at a moisture content of 10%(db). Results
showed that average particle size of the garri used was 0.60mm with a fineness
modulus of 4.79 and a uniformity index of 2:8:0. As expected, it was also found
that porosity, generally, increased with increase in particle size.
Specifically, at a particle size of 2.0mm, porosity was 43.8% which decreased
to 14.9% at a corresponding particle size of 0.15mm. The porosity may therefore
be useful in packaging and predicting the thermophysical properties of garri in
both secondary and tertiary processing unit operations simply because air has
its own thermal conductivity value.
