3D electrodes

 
 
Three dimensional electrodes
    The topic of my PhD for first one and half year was hydrodynamic behaviour of three dimensional electrodes. I'm still interested in 3DE, however, it is not my main concern. Here is a brief description of what I did.
Hydrodynamics of 3DE
    The main subject of my work is investigation of hydrodynamic behaviour of liquid–solid circulating fluidized bed. It has application in three-dimensional electrolytic cell. The liquid–solid system is represented by small spherical metal particles and water.
    Our apparatus can be simply described as special case of circulating fluidized bed but with increased emphasis on the downcomer. The hydrodynamic cell is rectangular channel and consists of two main parts. First one, downcomer, is slowly descending packed bed where particle behaviour is similar to discharging a silo. The second is the riser of CFB which ensure particle circulation.
    My study has two parts.
    Experimental goal is measurement of particle and water velocity profiles in both packed bed and riser. For this purpose I use high speed camera recording of particle motion and image processing technique. We have small laboratory hydrodynamic cell with adjustable inner geometry so we can easily measure velocity profiles for various cell modifications. We also use different particle materials to investigate their effect on flow pattern in the cell.
    More theoretical part is CFD simulation of the two phase flow inside the cell. I use Fluent as a solver. As first part of simulation I am trying to adjust model parameters in Fluent to fit experimental results. Later I intend to use CFD to propose and test new design of 3D electrodes.
Publications
  • Kristal J., Jiricny V.: Determination of Particle Velocity Profiles in the Moving Particle Bed Using a High Speed Camera. (Eng) 31th International Conference of Slovak Society of Chemical Engineering, Proceedings, p. 53, Tatranské Matliare, Slovakia, 24-28 May 2004.[pdf]
  • Robinson D.J., MacDonald S.a., Kristal J., Ondracek J., Jiricny V.: Diaphragm Selection for the Descending Bed Electrowinning Cell. (Eng) 16th International Congress of Chemical and Process Engineering CHISA 2004, Summaries 1, p. 145, Praha, Czech Republic, 22-26 August 2004.[pdf]
  • Kristal J., Jiricny V., Stanek V.: The CFD simulation and an experimental study of hydrodynamic behaviour of liquid-solid flow. (Eng) 16th International Congress of Chemical and Process Engineering CHISA 2004, Summaries 1, p. 145, Praha, Czech Republic, 22-26 August 2004.[pdf]

Page created: September 20, 2004
Last modified: November 30, 2006		 Back to my homepage
Institute of Chemical Process Fundamentals, Academy of Sciences, Czech Republic
Department of Diffusion and Separation Processes, Three Phase Systems Group
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