PEPT visualisation of particle motion in a tapered fluidised bed coater

Comparison and evaluation of interphase momentum exchange models for simulation of the solids volume fraction in tapered fluidised beds

“…Comparison and evaluation between time-averaged solids volume fractions obtained from experiments and from simulations with several drag coefficient models were made. The predicted results obtained by the different drag models were verified using experimental data of Depypere et al (2009). Initial results using a 2-phase Eulerian model showed poor agreement with experimental results.…”

“…Various drag models both available in FLUENT and proposed by researchers elsewhere were employed in the CFD simulations to assess the suitability of drag coefficient functions for modelling the hydrodynamics of the multiphase flow in tapered fluidised bed coaters. Finally, the results of the CFD simulation were compared with experimental results obtained with the positron emission particle tracking (PEPT) technique (Depypere, 2005;Depypere et al, 2009). …”

“…Moreover, this technology has proven to be applicable in different industries, e.g. the chemical, pharmaceutical, mineral and food industry, not only because it allows for a large number of unit operations to be performed within the same piece of equipment, either separately or sequentially (Depypere et al, 2003), but it also tunes the effect of functional ingredients and additives (Depypere et al, 2009). Due to the complex flow behaviour and many interactions taking place in fluidised bed systems which are not fully understood, there is still a need for mathematical models to improve the fundamental understanding of the flow inside the fluidised bed reactor (Cruz et al, 2006;Cornelissen et al, 2007).…”

PEPT: An invaluable tool for 3-D particle tracking and CFD simulation verification in hydrocyclone studies

“…fluidized bed (see, e.g., Ref. [1]), pharmaceutical coating process [2], casting process [3], and processing of solid-liquid food mixtures [4]. In addition to laboratory experiments, on-site particle tracking in a pressurized fluidized bed at BP's Hull Research and Technology Center using a portable PEPT camera was demonstrated by Ingram et al [5].…”

Characterising porosity of multi-component mixtures in rotary mills

“…Consequently, it has found wide application in the study of dynamic systems in engineering and science. For instance, it has been applied to the study of particulate systems and flow in multiphase systems (Parker et al, 1997b;Cox et al, 2003;Bakalis et al, 2006;Depypere et al, 2009). What follows is a detailed account of the PEPT technique.…”