Change search
ReferencesLink to record
Permanent link

Direct link
A collision efficiency model for flow-induced coagulation of fractal aggregates
ETH, Inst Chem & Bioengn, Dept Chem & Appl Biosci.ORCID iD: 0000-0001-7995-3151
2008 (English)In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 54, no 7, 1748-1760 p.Article in journal (Refereed) Published
Abstract [en]

A model for flow-induced collisions of fractal aggregates is developed. The model is based on the analysis of the relative trajectories between a pair of aggregates that takes into account their hydrodynamic and their colloidal interactions. Regarding the former, the aggregates are modeled as permeable spheres where the Brinkman equation is used to describe the flow inside the aggregates. Interparticle forces are incorporated by considering the forces between the primary particles in the two aggregates that are the nearest. The model results in a collision efficiency that depends on the masses of the colliding aggregates, the fractal dimension, and a nondimensional Hamaker constant characterizing the interparticle forces. The collision efficiency model is used to investigate the dynamics of a suspension undergoing coagulation. Significant deviations with respect to existing collision efficiency models are evidenced. 

Place, publisher, year, edition, pages
2008. Vol. 54, no 7, 1748-1760 p.
Keyword [en]
colloidal aggregation, relative trajectories, hydrodynamic interaction, permeability, population balance equations
National Category
Chemical Process Engineering
URN: urn:nbn:se:kth:diva-87897DOI: 10.1002/aic.11496ISI: 000257040300006OAI: diva2:502010
QC 20120214Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2012-02-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Bäbler, Matthäus
In the same journal
AIChE Journal
Chemical Process Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 80 hits
ReferencesLink to record
Permanent link

Direct link