What We Learned from ISMIP 2017
The ninth iteration of the International Symposium on Mixing in Industrial Processes (ISMIP) took place at the Hyatt Regency Birmingham this year. Academics, researchers, and professionals of the mixing community were invited to explore and discuss innovative developments in the field of mixing processes. A number of projects utilised ITS systems to characterise and advance their data and processes. Keep reading for a summary of the projects that we found the most fascinating!
Characterisation of Complex Multiphase Fluids Using Process Tomography – Industrial Tomography Systems
ITS’ very own Research Engineer Thomas Machin presented his work using concept built sensors to explain real-time flow and rheological data. Such arrangements operate on the principle of Electrical Resistance Tomography (ERT) and support work on the development of in-line and vessel-based velocimeters, which can be used to understand and interpret rheological information of concentrated opaque mixtures.
An in-line, pipe-based Rheometer allows for data collection on fluid properties during processing, meaning it will help monitor processing performance. The second sensor, a Vessel Wall Velocimeter, determines the near-wall velocity field vectors and demonstrates the shear rate at the wall and may subsequently be utilised as a rheological fingerprinting tool. The development of these sensors illustrates the many future opportunities for understanding fluid mixing performance and innovation of vessel-based velocimeters.
Towards Increased Quantification of Electrical Resistance Tomography using Linear Probes in Fluid Mixing Diagnosis – Johnson Matthey
The use of ERT has proven itself to be highly useful for understanding the conductivity changes within a pipeline or vessel. Small-scale studies using the probes have demonstrated that ERT is necessary to detecting phenomena like turbulence. This project showed that using suspended conducting particles improves the observations of their effects upon both conductivity and distribution over the height of the tank. Furthermore, the study also elaborates on the use of dynamic reference planes as a measurement technique. To conclude, these two reliable methods can evaluate the distribution of conducting solids and measure cloud height, whilst ERT plays a pivotal role in realising the data.
Gas-Liquid Multiphase Mixing in dual axial radial agitated vessel in Heterogeneous Regime – The University of Manchester
Gas-liquid mixing has been the focus of many research studies focusing on how to optimise the mixing processes throughout differing fluidic stages. Many previous studies have cantered around low gas velocities, leaving a gap for further research into the hydrodynamics of gas-liquid mixing at high gas velocities. This project used ERT to examine the 3D images of the distribution of gas in their research, highlighting the importance of visual results in order to gain insight into the possibility of high gas velocities.
- Machin, T., Simmons, M., Greenwood, R, and Wei, K. 2017. Characterisation of complex multiphase fluids using process tomography. ISMIP, 25-28 June 2017, Birmingham, United Kingdom. Industrial Tomography Systems.
- Forte, G., et. al. 2017. Towards increased quantification of Electrical Resistance Tomography using linear probes in fluid mixing diagnosis. ISMIP, 25-28 June 2017, Birmingham, United Kingdom. Johnson Matthey Technology Centre.
- Jamshed, A., Cooke, M., and Rodgers, R. 2017. Gas-liquid multiphase mixing in dual axial radial agitated vessel in heterogeneous regime. ISMIP, 25-28 June 2017, Birmingham, United Kingdom. The University of Manchester.
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