Modeling service life of pleated filters exposed to poly-dispersed aerosols

On the filtration performance of dust-loaded trilobal fibers

“…Therefore, the computational cost of conducting microscale simulations rapidly increases for particles with small diameters relative to the fibers. Our macroscale modeling strategy, on the other hand, is designed for simulations in which resolving the actual shape of the particles in a dendrite has no real significance, and therefore the dendrite can be simulated with a coarser resolution as discussed in our previous work [34][35][36]. In the macroscale model, each computational cell in the dendrite can accommodate more than one particle.…”

“…The macroscale simulations, therefore, do not require excessively refined cells. In addition, to accelerate the formation of dendrites on a fiber in the macroscale models, the particles can be injected in clusters rather than individually (see [35,36] for more detailed information).…”

“…The unfilled cells, on the other hand, are treated as individual filters, and the amount of particle deposited in each of them is calculated using the cell model equations given in Appendix A (see [36] for more information).…”

“…However, this is at the cost of losing the morphology of the dendrites. As described elsewhere [36], the outcomes of our macroscale model depend on the choice of the so-called cluster-to-cell volume ratio (CCVR) considered for the aerosol particles. Simulations conducted with a large CCVR are faster but less accurate.…”

“…This allows us to produce particle dendrites with realistic morphologies [16,33,36]. As such, the simulations should be repeated a few times to reduce the statistical uncertainty of the results.…”