“…1) (Anderson et al, 1972;Volchkov et al, 1993;Goldshtik et al, 1997;de Broqueville, 2005de Broqueville, , 2006aDe Wilde et al, 2006, 2007aDe Wilde andde Broqueville, 2007, 2008). The fluidization gas is forced to leave the fluidization chamber via a central chimney, introducing a radial motion of the gas.…”