Assessment of gel formation in colloidal dispersions during mixing in turbulent jets
Soos, Miroslav and Marchisio, Daniele L. and Sefcik, Jan (2013) Assessment of gel formation in colloidal dispersions during mixing in turbulent jets. AIChE Journal, 59 (12). pp. 4567-4581. ISSN 0001-1541
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Onset of gel formation upon mixing between colloidal dispersions and coagulant solutions in turbulent jets was studied using a combination of computational fluid dynamics (CFD) and population balance equation (PBE). To describe the interaction between turbulence fluctuations and particle aggregation, a micromixing model based on presumed probability density function was implemented inside the CFD code. Furthermore, effect of the solid phase on the fluid flow was modeled through an effective viscosity of the mixture evaluated from PBE. The results are presented in the parameter space of the primary particle diameter and the solid volume fraction where strong interplay between mixing and aggregation mechanisms controls the gelation phenomena and consequently also the fluid dynamics. Simulation results are in good agreement with observations from gelation experiments of concentrated nanoparticle suspensions injected into coagulant solutions.
| Author(s): | Soos, Miroslav, Marchisio, Daniele L. and Sefcik, Jan | Item type: | Article |
|---|---|
| ID code: | 56526 |
| Keywords: | aggregation, gelation, turbulent flow, mixing, micromixing, colloidal dispersions, Chemical engineering, Chemical Engineering(all), Biotechnology, Environmental Engineering |
| Subjects: | Technology > Chemical engineering |
| Department: | Faculty of Engineering > Chemical and Process Engineering Technology and Innovation Centre > Bionanotechnology Technology and Innovation Centre > Continuous Manufacturing and Crystallisation (CMAC) |
| Depositing user: | Pure Administrator |
| Date deposited: | 25 May 2016 15:46 |
| Last modified: | 03 Jan 2019 14:46 |
| URI: | https://strathprints.strath.ac.uk/id/eprint/56526 |
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