当流体通过床层的速度逐渐提高到某值时，颗粒出现松动，颗粒间空隙增大，床层体积出现膨胀。如果再进一步提高流体速度，床层将不能维持固定状态。此时，颗粒全部悬浮于流体中，显示出相当不规则的运动。随着流速的提高，颗粒的运动愈加剧烈，床层的膨胀也随之增大，但是颗粒仍逗留在床层内而不被流体带出。床层的这种状态和液体相似称为流化床。其中，流化床的种类有：最小流化床，鼓泡流化床，腾涌流化床。

CFB-11 will be held in Beijing, China, in May 2014. The conference themes have been expanded in the past ten conferences to include fluidized bed studies beyond traditionally focused area, the circulating fluidized beds. The official title of the conference has been renamed to International Conference on Fluidized Bed Technology to reflect this change.

CFB-11 addresses both fundamental and applied aspects of circulating fluidized beds and fluidized bed systems, which covers but is not limited to the themes of, e.g.,  

Themes：
    Hydrodynamics of gas-solid flow
    Computational fluid dynamics
    Modeling and computation
    Heat and mass transfer
    Fine particle and nano-particle systems
    Process design and scale-up
    Measurement and instrumentation
    Fluid catalytic cracking and other catalytic processes
    Combustion, pyrolysis and gasification
    Chemical looping processes
    Mineral processing

Registration Fee (Unit: USD):

  The registration fee includes:  

• Entrance into all oral and poster sessions.      
• Access to the welcome reception, three lunches, refreshments during breaks (Conference dinners and banquet are not included and are charged separately).
• Conference Kit (bag, badge, program and conference proceedings)

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