User Profile: University of Cambridge
In this new series of articles, ITS shines the spotlight on some of the applications that our tomography technology is used for and introduces you to the talented engineers behind these projects. In this first User Profile we’re looking at research conducted by a leading UK university:
Dr. Daniel Holland (pictured right)
Department of Chemical Engineering and Biotechnology, University of Cambridge
What are your current research objectives?
We are interested in understanding the fundamentals of multiphase flow, especially gas-solid fluidised beds. As part of this we also seek to develop and improve tomographic imaging techniques themselves by optimising the image reconstruction.
Which tomography system do you use and how long have you been using electrical tomography for your research?
We primarily use the the m3c electrical capacitance tomography system, though we have also recently begun to use the new v5r electrical resistance tomography instrument. We began working with electrical tomography in a collaboration with LS Fan at Ohio State University back in 2007. Over the last three years we have developed our own electrical tomography capability using ITS hardware.
What do you use your system for?
We use tomographic imaging to gain phenomenological insight into fluidisation behaviour and also as a tool for the validation of the latest computational fluid dynamic simulations of these systems.
Have you published any papers on your research with your system?
We have so far published two papers using our system:
- Chandrasekera, T.C.; Yi Li; Dennis, J.S.; Holland, D.J., “Total variation image reconstruction for electrical capacitance tomography”, Imaging Systems and Techniques (IST), 2012 IEEE International Conference on , vol., no., pp.584,589, 16-17 July 2012
- Y Li and D J Holland, Fast and robust 3D electrical capacitance tomography 2013 Meas. Sci. Technol. 24 105406 and have two further publications pending.
What have you learned about your process by using our instruments?
To date our experiments have focused on developing the tomographic technique itself and quantifying the accuracy of the measurements. However, we recently completed a series of experiments to quantify the bubble size in a small gas-solid fluidised bed and compare this with existing correlations available in the literature. We hope to extend these measurements to larger scale systems in the near future.
What are the benefits in using our tomography systems?
They provide non-invasive, fast and scalable measurements of multiphase flow at a relatively affordable cost.
If, like Dr Holland, you’re interested in introducing tomography into your research, why not take a look at our Research & Education Package? Alternatively, you can contact us directly to discuss your application with one of our team; simply send us an email, enquire online, or call +44 (0) 161 832 9297.