The MIIS Eprints Archive

Brewing of filter coffee

Booth, C. and Cummins, C. and Dalwadi, M. and Dellar, P. and Devereux, M. and Dewynne, J. and Donohue, J. and Duncan, A. and Fitzmaurice, F. and Gordon, A. and Hennessy, M. and Hinch, J. and Hickey, C. and Hjorth, P. and Kyrke-Smith, T. and Leahy, D. and Lee, W. and Lynch, E. and Mercier, O. and Miklavcic, S. and Russell, S. and Schwartz, L. and Shozi, B.F. and Swierczynski, P. and Timoney, C. and Tomczyk, J. and Warneford, E. (2012) Brewing of filter coffee. [Study Group Report]



We report progress on mathematical modelling of coffee grounds in a drip filter coffee machine. The report focuses on the evolution of the shape of the bed of coffee grounds during extraction with some work also carried out on the chemistry of extraction. This work was sponsored by Philips who are interested in understanding an observed correlation between the final shape of the coffee grounds and the quality of the coffee. We used experimental data gathered by Philips and ourselves to identify regimes in the coffee brewing process and relevant regions of parameter space. Our work makes it clear that a number of separate processes define the shape of the coffee bed depending on the values of the parameters involved e.g. the size of the grains and the speed of fluid flow during extraction. We began work on constructing mathematical models of the redistribution of the coffee grounds specialised to each region and on a model of extraction. A variety of analytic and numerical tools were used. Furthermore our research has progressed far enough to allow us to begin to exploit connections between this problem and other areas of science, in particular the areas of sedimentology and geomorphology, where the processes we have observed in coffee brewing have been studied.

Item Type:Study Group Report
Problem Sectors:Food and Drink
Study Groups:European Study Group with Industry > ESGI 87 (Limerick, Ireland, 24 - 29 June, 2012)
Company Name:Philips Research
ID Code:605
Deposited By: Matthew Hennessy
Deposited On:03 Apr 2013 15:39
Last Modified:29 May 2015 20:13

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