The direct incorporation of CFD into DEM to study the gas fluidization process so far has been attempted by Tsuji et al . and most recently by Hoomans et al ., Deb et al . and Peng et al.
32.
"' Fluidization "'( or "'fluidisation "') is a process similar to liquefaction whereby a granular material is converted from a static solid-like state to a dynamic fluid-like state.
33.
The flexibility of using GLSCFB allow the fluidized bed to operate at much more higher liquid velocity than the minimum fluidization velocity which in turn increase the fractional conversion as well as production efficiency per unit cross-sectional area of the bed.
34.
As gas velocity in the annulus depends on a calculated velocity of the solids ejected from bubbles, it is more difficult for the solids coming from the annulus with increasing velocity in the nozzle to penetrate into the central gas jet under a constant fluidization velocity.
35.
The role of apparent weight is also important in fluidization, when dealing with a number of particles, as it is the amount of force that the " upward drag force " needs to overcome in order for the particles to rise and for fluidization to occur.
36.
The role of apparent weight is also important in fluidization, when dealing with a number of particles, as it is the amount of force that the " upward drag force " needs to overcome in order for the particles to rise and for fluidization to occur.
37.
It can be assumed that according to high number of wavefronts transferred through the minerals and resulting high number of cavity implosions, the structure of quartz was partially disrupted during the fluidization and the distribution of prevailing pressure was respected during the transfer into a solid state.
38.
Beyond the minimum fluidization velocity ( u \ geq u _ { mf } ), the bed material will be suspended by the gas-stream and further increases in the velocity will have a reduced effect on the pressure, owing to sufficient percolation of the gas flow.
39.
Due the AFB being a recent advancement in fluidization technology, little systematic study has been done on this, and characterising global and local flow patterns may prove difficult for chemical engineers as the " bed hydrodynamics are not the same in small and large scale fluidized beds ".
40.
The dissertation, " The dynamics of degassing and explosive volcanism in kimberlite pipes ", involved experimental work on the gas-fluidization of particles and fieldwork at Jwaneng Diamond Mine in the Kalahari Desert, Botswana, and the De Beers Venetia Mine on the South Africa-Zimbabwe border.
