Arguments on heat transfer in gas fluidized beds

1993 ◽  
Vol 48 (4) ◽  
pp. 761-770 ◽  
Author(s):  
O. Molerus
Keyword(s):  
Heat Transfer ◽  
Fluidized Beds ◽  
Gas Fluidized Beds

Solids Circulation in Turbulent Fluidized Beds and Heat Transfer to Immersed Tube Banks

1979 ◽  
Vol 101 (3) ◽  
pp. 391-396 ◽  
Author(s):  
F. W. Staub
Keyword(s):  
Heat Transfer ◽  
Turbulent Flow ◽  
Flow Regime ◽  
Fluidized Beds ◽  
Flow Model ◽  
Flow Measurements ◽  
Turbulent Flow Regime ◽  
Gas Fluidized Beds ◽  
Tube Banks ◽  
Superficial Gas Velocity

In gas fluidized beds of large particles, a change in flow regime from bubbling flow to turbulent flow has been observed as the superficial gas velocity is increased. Solids flow and heat transfer models based on the bubbling flow regime are not generally adequate in the turbulent flow regime. A turbulent flow model is given here that is supported by limited solids flow measurements. A simplified model of the heat transfer to tube banks immersed in fluidized beds, that employs the solids flow model, is also given and is shown to be supported by data over a wide gas pressure and temperature range with particles in the 350μm to 2600μm size range.

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