  A computational method for magnetically guided drug delivery is presented and
the results are compared for the aggregation process of magnetic particles
within a fluid environment. The model is developed for the simulation of the
aggregation patterns of magnetic nanoparticles under the influence of MRI
magnetic coils. A novel approach for the calculation of the drag coefficient of
aggregates is presented. The comparison against experimental and numerical
results from the literature is showed that the proposed method predicts well
the aggregations in respect to their size and pattern dependance, on the
concentration and the strength of the magnetic field, as well as their velocity
when particles are driven through the fluid by magnetic gradients.
