Pressure drop model for nanostructured deposits

A simple semi-empirical model for effective density measurements of fractal aggregates

“…A classical analysis of threshold TEM images was used to determine the fractal properties of CAST soot particles (Brasil, Farias, & Carvalho, 1999;Köylü, Faeth, Farias, & Carvalho, 1995;Ouf, Yon, Ausset, Coppalle, & Maillé, 2010). The count median diameter and the geometric standard deviation of the primary particles composing the GFG1000 agglomerates are reported in Table 1; these values were originally determined by Thomas, Ouf, Gensdarmes, Bourrous, and Bouilloux (2014) and Wentzel, Gorzawski, Naumann, Saathoff, and Weinbruch (2003). Because very few fractal analyses are found in the literature for these particles and because observations with highresolution transmission electronic microscopy are impaired by an inadequate resolution for such amorphous particles, we chose to use static light scattering at a wavelength of 532 nm to perform this analysis in our lab with the apparatus described in Caumont-Prim, Yon, Coppalle, Ouf, and Fang Ren (2013).…”

Fine Particle Filtration Technology Using Fiber as Dust Collection Medium

“…Joubert A. et al (2011) proposed a model for the pressure drop across HEPA filters during cake filtration in the presence of humidity. Thomas D. et al (2014) and Bourrous et al (2016) derived a model of clogging process of nano-size particles based on precise measurement of porosity and thickness of deposit and deposit distribution in the filter as, …”

“…Hasolli N. et al (2013a, b) evaluated the filtration performance of depth filter media cartridges as function of layer structure and pleat count. Bourrous S. et al (2014) measured the nano-particles distribution in the pleated filters during clogging. Li J. et al (2015) studied the improvement of dust cleaning effect by the installation of cone in a pleated filter cartridge during pulse-jet cleaning.…”

Modeling of the deep granular bed clogging by nanoparticles

“…Thus, β* can intuitively be assumed to correlate with the permeability of the granular bed (K GB ) and of the deposit (K d ). These permeabilities were calculated by applying the Kozeny-Carman law and a pressure drop model for nanostructured deposits [25], respectively. The flow resistances of the deposit and of the free pore space depend directly on the volume occupied by the deposit.…”

“…Some authors assumed a dendritic pattern of nanoparticle deposits [25,26]. In line with this theory, the deposit per collector was defined as a set of cylinders with the same diameter as the collected agglomerates and a length equal to the instantaneous thickness of the layer deposited on the impermeable shell formed during phase A ( Figure 5).…”