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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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4I-3 ultrasonic monitoring of heterogeneous chemical reactions

Tramontana, M. and Gachagan, A. and Hayward, G. and Nordon, A. and Littlejohn, D. (2007) 4I-3 ultrasonic monitoring of heterogeneous chemical reactions. In: UNSPECIFIED.

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Abstract

This paper describes a novel approach to analyse the complex interactions between chemical particles and the vessel wall of a reactor vessel using Finite Element (FE) modeling. A 4-layer model has been developed comprising a liquid load medium and a glass-oil-glass combination corresponding to the jacketed reactor. The model has been experimentally validated with excellent correlation achieved. The excitation function was derived from Hertz's theory and used as the model stimulus corresponding to particles striking the inner glass wall. The FE simulations predict: an increase in energy with an increase in either particle size or concentration; a lowering of principal frequency components with increasing particle size; and a low pass filtering effect introduced by the reactor vessel itself. The most significant outcome is that the frequency range of interest is below 150 kHz with the principal components between 10-60 kHz. This has been confirmed experimentally using ultrasonic transducers, in both resonant and non-resonant modes of operation. Consequently, both stacked composite and 1-3 connectivity composite transducers have been designed to match the desired spectral range. This work has resulted in successful discrimination of both particle size and concentration, with a detection limit of 0.1 g/dm3.