title: Concurrent Modeling of Hydrodynamics and Interaction Forces Improves Particle Deposition Predictions.
abstract: It is widely believed that media surface roughness enhances particle deposition-numerous, but inconsistent, examples of this effect have been reported. Here, a new mathematical framework describing the effects of hydrodynamics and interaction forces on particle deposition on rough spherical collectors in absence of an energy barrier was developed and validated. In addition to quantifying DLVO force, the model includes improved descriptions of flow field profiles and hydrodynamic retardation functions. This work demonstrates that hydrodynamic effects can significantly alter particle deposition relative to expectations when only the DLVO force is considered. Moreover, the combined effects of hydrodynamics and interaction forces on particle deposition on rough, spherical media are not additive, but synergistic. Notably, the developed model's particle deposition predictions are in closer agreement with experimental observations than those from current models, demonstrating the importance of inclusion of roughness impacts in particle deposition description/simulation. Consideration of hydrodynamic contributions to particle deposition may help to explain discrepancies between model-based expectations and experimental outcomes and improve descriptions of particle deposition during physicochemical filtration in systems with nonsmooth collector surfaces.
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo , 200 University Ave W., Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Chao
authors.initials: C
authors.lastname: Jin
authors.affiliation: Department of Mechanical and Mechatronics Engineering, University of Waterloo , 200 University Ave W., Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Carolyn L
authors.initials: CL
authors.lastname: Ren
authors.affiliation: Department of Civil and Environmental Engineering, University of Waterloo , 200 University Ave W., Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Monica B
authors.initials: MB
authors.lastname: Emelko
mesh_terms: D003102:Colloids; D005374:Filtration; D057446:Hydrodynamics; D062070:Hydrology / Q000379:methods*; D008962:Models, Theoretical; D016062:Porosity; D013499:Surface Properties
chemical_list: D003102:Colloids