Theory of Filtering
A complete solution through theorical procedures of the theory of filtering comes out to be extremely difficult. There are too many imponderable factors which can come up and which consist especially in the nature of the solid particles contained within the liquid and and in the physical characteristic of the liquid itself. Moreover, the successive stopping of the particles down to a certain minimum is not actually caused the filtering septum, but rather by the initial deposit of solid by on the filter. We can consider the panel of thickness 1 as a whole of capillary tubes which the liquid with a velocity which is maintained within the laminar rante. passes For this then, Poiseuille s law is valid: