The results of the simulation for the counter-current configuration
are depicted in Fig. 4. The predicted pressure rises gradually
at the beginning before rising rapidly towards the end. The model
accurately predicts the measured pressures; the spikes in the
error measurements are due to the spikes in the clogging data
(Fig. 3a).
The results for the co-current configuration (Fig. 5) show a
similar gradual rise at the beginning before the rapid rise at the
end; the maximum and mean error for the predictions are better
than those for the counter-current configuration