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Dr P Grassia
Applications accepted all year round
Competition Funded PhD Project (Students Worldwide)
About the Project
Deactivation of Oil-Particle Antifoams
Typically in laundry wash applications one is trying to remove particle-containing oil droplets from clothes in a surrounding aqueous foam environment. The particles and oils act in synergy to break foam, but this `antifoam' behaviour can deactivate with time. The precise cause of deactivation is unknown, but is believed to be associated with changes in the distribution of particles amongst the oil droplets. This project will use computer modelling techniques to investigate how the distribution of oil droplets and particles evolves, in order to gain insight into antifoam deactivation. Specifically rule-based models will be employed describing how oil droplet coalescence is enhanced by particles and how oil droplet break up is suppressed by particles. The sensitivity of the system behaviour to parameters within the rule-based models will be explored.
This project will suit a student interested in applying their skills in applied mathematics and computer simulation to problems of engineering interest.
Typically in laundry wash applications one is trying to remove particle-containing oil droplets from clothes in a surrounding aqueous foam environment. The particles and oils act in synergy to break foam, but this `antifoam' behaviour can deactivate with time. The precise cause of deactivation is unknown, but is believed to be associated with changes in the distribution of particles amongst the oil droplets. This project will use computer modelling techniques to investigate how the distribution of oil droplets and particles evolves, in order to gain insight into antifoam deactivation. Specifically rule-based models will be employed describing how oil droplet coalescence is enhanced by particles and how oil droplet break up is suppressed by particles. The sensitivity of the system behaviour to parameters within the rule-based models will be explored.
This project will suit a student interested in applying their skills in applied mathematics and computer simulation to problems of engineering interest.
Funding Notes
Some funding may be available, but competition for funds is expected to be extremely high.
References
Further reading:
Denkov, N. D., Marinova, K. G., Christova, C., Hadjiiski, A. and Cooper, P. (2000) Mechanisms of action of mixed solid-liquid antifoams: Exhaustion and reactivation. Langmuir vol 16, pp 2515--2528
Marinova, K. G., Tcholakova, S., Denkov N. D., Roussev, S. and Deruelle, M. (2003) Model studies on the mechanism of deactivation (exhaustion) of mixed oil-silica antifoams. Langmuir vol 19, pp 3084--3089
Denkov, N. D., Marinova, K. G., Christova, C., Hadjiiski, A. and Cooper, P. (2000) Mechanisms of action of mixed solid-liquid antifoams: Exhaustion and reactivation. Langmuir vol 16, pp 2515--2528
Marinova, K. G., Tcholakova, S., Denkov N. D., Roussev, S. and Deruelle, M. (2003) Model studies on the mechanism of deactivation (exhaustion) of mixed oil-silica antifoams. Langmuir vol 19, pp 3084--3089
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