bed voidage and heat transfer in non-newtonian liquid-solid fluidized bed
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abstract
the presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. the aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coefficient for solid-liquid fluidization in a cylindrical tube and to study the effect of process parameters such as particle size and density, flow velocity, and liquid viscosity on these subjects. a large number of experiments were performed using different cylindrical and spherical particles fluidized in aqueous cmc solution with different concentrations. using the experimental results, a new correlation for predicting heat transfer coefficient in non-newtonian liquid-solid fluidized bed heat exchanger was introduced.
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Journal title:
iranian journal of chemistry and chemical engineering (ijcce)Publisher: iranian institute of research and development in chemical industries (irdci)-acecr
ISSN 1021-9986
volume 23
issue 2 2004
Keywords
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