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Best poster prize for Filipa Gonçalves de Azevedo

last modified Jan 29, 2014 04:07 PM
Best poster prize for Filipa Gonçalves de Azevedo

From left to right: Front row: Alastair Clarke, Yucy Fang, Mariana Domingos, Filipa Gonçalves de Azevedo, Akin Ali. Back row: Carmine D'Agostino, Alexandre Navarro, Pieterjan Van Uytvanck

Members of the Fluids and Environment Group were distinguished with the best poster prize and a special commendation for best student poster at the Chemical Engineering Day UK conference, Imperial College on 25-26 March 2013.

Filipa Gonçalves de Azevedo's poster on the "Effects of Natural and Forced Convection on Low Temperature Combustion" was awarded the best poster prize within the "Catalysis and Reaction Engineering" session. The work used timescales to describe each transport and reaction phenomena and focused on their effects on combustive systems. Two problems in a spherical reactor were analysed: a case with a three-step reaction scheme and natural convection a case with a single-step reaction, forced convection and reaction consumption. Two and three-dimensional regime diagrams were proposed to characterise the oscillatory and explosive behaviour of the systems. These results have important implications for designing safe operation conditions for chemical processes such as chemical storage, waste treatment or combustion in automotive engines.

Temperature / concentration figure
Temperature (left hemisphere) and concentration (right hemisphere) evolution in a batch spherical reactor without convection (top) and with convection (bottom).

 

Mariana Domingos’ poster, entitled “Turbulent plumes and thermals with internal buoyancy changes”, received a special commendation for best student poster within the ‘Fluid Flow and Mixing’ session. The work looked at the effect of chemical reaction, dissolution or radioactive decay, on the motion of plumes and thermals. The impact of these processes on the spreading level of the plume/thermal and on the level of complete depletion of source fluid was investigated. The theoretical findings were applied to the BP oil spill plume and the Fukushima nuclear cloud, unveiling the importance of the release depth and the bubble size for the BP oil spill plume, and the time elapsed between reactor shut-down and explosion for a nuclear cloud.

Figure 2
Buoyant fluid reacting chemically with the environment. The figure shows the progression of reaction for different reactant concentrations at the source (C1<C2<C3) at two different times from the release (t1<t2).

 

Silvana Cardoso delivered an invited talk entitled “Buoyancy effects in Chemical Engineering Flows” within the “Fluid Flow and Mixing” session. The talk described the interaction of hydrodynamics and chemistry in two-phase plumes in the ocean and carbon-dioxide storage in saline aquifers.