Paste, Particle and Polymer Processing group (P4G)
The P4G was formed in January 2013 by the (friendly) merger of two of the groups in the Department of Chemical Engineering and Biotechnology with an interest in structured materials and processing: the Paste and Particle Processing group (P3G) led by Drs Ian Wilson, Sarah Rough and David Scott and the Polymer Fluids group led by Dr Bart Hallmark. Retired staff Drs. Bill Paterson and Bob Skelton also contribute.
Our interests lie in developing the understanding of processing of pastes, particles and polymers, and their flow behaviour in particular. We rarely synthesize components: rather, we build from existing materials. We apply that knowledge to manufacture, at industrial scale, products with desired microstructure or function, or, equally importantly, to resolve problems encountered in processing such materials.
A substantial part of the activities led by Dr Wilson is related to studying the formation and removal of fouling layers on heat transfer and process equipment surfaces.
The group's activities range from fundamental theoretical, numerical and experimental investigations to applied and proof-of-concept studies. The research page gives a full listing of ongoing and past projects, including access to the archives of the Powder and Paste Processing Group and the Polymer Fluids Group.
The group is part of the Microstructure Engineering Cluster within Chemical Engineering & Biotechnology. There are shared projects with the Structured Materials, Colloid Dispersions and Process Systems Engineering groups.
- Dr Ian Wilson has been awarded the ScD degree by the University of Cambridge for his contributions to the fields of heat exchanger fouling and cleaning.
- Dr Ian Wilson was awarded the Bingham Fluid Medal at the 2013 biannual Viscoplastic Fluids: From Theory to Application conference held in Reuil-Malmaison, Paris, from 18-21 November 2013. This informal award (not to be confused with the Eugene Bingham Medal given by the Society of Rheology) is given biennially and recognises the contribution of members of the viscoplastic fluids community. In awarding the medal, Prof Ian Frigaard noted that "Ian tackles real problems, with significant complexity in both the materials and the processing aspects. Yet he tries to find simple answers and give practically applicable results, often significant in being able to advance our scientific knowledge. The community appreciates his dedication to the field and many contributions in semi-solid materials, pastes, fouling, food processing and rheology."
- Paper published in International journal of pharmaceutics - A comparison of screen and ram extrusion-spheronisation of simple pharmaceutical pastes based on microcrystalline cellulose.
- Paper published in Chemical Engineering Science - Flow patterns and draining films created by horizontal and inclined coherent water jets impinging on vertical walls.
- Paper published in Journal of Food Engineering - Investigating the effect of starting mode on food fat gel layer formation on cold surfaces.
- Best Presentation at AIChE Spring Meeting Group members Edward Ishiyama and Ian Wilson were co-authors (along with Alison Ogden-Quin and Graham Birch [both Ineos] and presenting author Simon Pugh [IHS]) of the paper 'How to get the best from your preheat train - a UK refinery based sase study’ which was awarded one of the 9 presentation prizes sponsored by the AIChE Fuels and Petrochemicals Division at the 2013 AIChE spring meeting held in Houston, Texas.
- Best Poster Award at Conference: Qianpeng Yang (Mong Fellowship visitor at Sidney Sussex and P4G member 2012/13) won one of the best poster awards at the Xth International Conference on Heat Exchanger Fouling and Cleaning held in Budapest, Hungary. The paper title was 'A new approach for mitigating biofouling by promoting on-line cleaning using a sacrificial paraffin coating' and his co-authors were DI Wilson, S Chang and L. Shi. Well done Qianpeng!
- Paper published in Food and Bioproducts Processing - Evolution of cake batter bubble structure and rheology during planetary mixing.
- Paper published in J Food Engineering - Comparison of the rheology of bubbly liquids prepared by whisking air into a viscous liquid (honey) and a shear-thinning liquid (guar gum solutions).
P4G Group Menu
Academic collaborators within Cambridge include
Active external academic collaborators
- Dr John Chew (University of Bath)
- Dr Wolfgang Augustin and Prof Stephan Scholl (Technical University of Braunschweig)
- Prof Francis Gadala-Maria (University of South Carolina)
- Prof Shi (Tsinghua University)
- Prof Graham Polley (University of Guanajuato)
- Prof Jens-Peter Majschak (Technical University of Dresden)
- Prof Encarnación Jurado Alameda (University of Granada)
Sponsorship and funding comes from a range of sources, including the TSB, ESPRC and industry. This support is gratefully acknowledged: more information about sponsoring bodies is available on the Group Links page.
P4G also hosts the Fluid Dynamic Gauging website: this technique was developed within the P3G group.