Experimental and modeled deposition kinetics of large colloidal particles

Multiscale-linking simulation of irreversible colloidal deposition in the presence of DLVO interactions

“…However, attractive van der Waals interactions could overcome the weak electrostatic repulsions for particles with low surface charge densities at high salt concentrations, leading to the unphysical situation of particle overlaps in the simulation. In order to avoid particle overlaps, we used the approach implemented by Carl et al [37]. During the simulation, if a collision is predicted to occur between two particles, one of them is displaced until the center-to-center distance equals the minimum interparticle separation distance r * ij = 2 + 0.3/a, where a is expressed in nanometers.…”

“…Such comparisons for the evolution of θ are rare, and to the best of our knowledge, the only other BDS study which directly compared evolution of θ to experimental results was that of Carl et al [37], who studied the influence of gravity on the deposition of large particles (a > 1 µm). We have chosen experimental data (Table 5) at sufficiently large volume fraction to allow for performing simulations within a pragmatic amount of computational time.…”

New Cooperative Effects in Ballistic Deposition of Hard Disks

“…In this Letter, we are interested in one of such problems, namely, the irreversible formation of monolayers by deposition of large colloidal particles from fluid suspensions onto solid surfaces. In a typical experiment, one considers a diluted suspension of colloidal particles, which sediment due to the effect of gravity [2,3]. We are interested in situations in which the density difference between the solvent and the particles is large, so that the effect of diffusion in the motion of the particles can be neglected.…”

“…In this case, the saturation coverage has also been obtained analytically ( 1 0:808 65). The success of the BD model in VOLUME 89, NUMBER 27 explaining experimental data [2,4] has motivated the introduction of many improvements in the model in order to account for fine details neglected in the original BD model [9,10]. In the case of BD of hard disks, the effect of hydrodynamic interactions [9] and external fields [10] has been analyzed.…”

“…At this point, the obvious question is if this kind of effects, predicted for the 2D system, are observable in actual 3D systems. In a recent paper by Carl et al [2], experimental results for latexes and erythrocytes are compared with BD predictions and Brownian dynamics simulations. In these simulations, the trapped particles are not removed so multilayer formation is possible.…”