Particle filtration and deposition

If the daughter particles depend on the fluid properties, a dependence on Vf and can be included in flie definitions of P and N. 

The porosity is readily defined as the amount of space unoccupied by the objects and free to be filled with fluid, whereas the average object size is often interpreted as the equivalent spherical diameter Dq = 6js, which is determined in turn from the specific surface area s of the porous medium. If the system is described as a continuum with superficial 

Equation (5.132) states that when the particle velocity increases (or when the particle size increases) the theoretical conditions under which the deposition rate coefficient was derived are no longer valid and the actual deposition rate is smaller than the theoretical one (i.e. 7d c 1). Moreover, because particles have a finite size d, the deposition rate coefficient (derived assuming point particles) must be corrected. This correction is introduced through the interception efficiency  

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