Modeling Colloidal Particle Aggregation Using Cluster Aggregation with Multiple Particle Interactions

Antonsson, JakobGothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,Chalmers tekniska högskola,Chalmers University of Technology (författare)

In this study, we investigate the aggregation dynamics of colloidal silica by generating simulated structures and comparing them to experimental data gathered through scanning transmission electron microscopy (STEM). More specifically, diffusion-limited cluster aggregation and reaction-limited cluster aggregation models with different functions for the probability of particles sticking upon contact were used. Aside from using a constant sticking probability, the sticking probability was allowed to depend on the masses of the colliding clusters and on the number of particles close to the collision between clusters. The different models of the sticking probability were evaluated based on the goodness-of-fit of spatial summary statistics. Furthermore, the models were compared to the experimental data by calculating the structures’ fractal dimension and mass transport properties from simulations of flow and diffusion. The sticking probability, depending on the interaction with multiple particles close to the collision site, led to structures most similar to the STEM data.

Hamngren Blomqvist, Charlotte,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hamngren (författare)
Olsson, Eva,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f10eva (författare)
Gebäck, Tobias,1977Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tobiasg (författare)
Särkkä, Aila,1962Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)aila (författare)
Göteborgs universitetInstitutionen för matematiska vetenskaper (creator_code:org_t)

Av författaren/redakt...: Antonsson, Jakob; Hamngren Blomqvi ...; Olsson, Eva, 196 ...; Gebäck, Tobias, ...; Särkkä, Aila, 19 ...

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