A fluidizable bed (10) comprises a receptacle (12), a diffuser board (14) dividing the receptacle (12) into a plenum (16) and a fluidizable medium container (20), a fluidizable medium (30) residing in the container, and a partition (32) dividing the plenum (16) into a first chamber (34) adapted to receive a first stream (36) of fluidizing medium (30) and a second chamber (40) adapted to receive a second stream (42) of fluidizing medium (30). In operation a first stream (36) of the fluidizing medium (30) is admitted to the first chamber (34) and a second stream (42) of the fluidizing medium (30) is admitting to the second chamber (40). By admitting the fluidizing medium (30) to the chambers in a phased, cyclic fashion the benefits of lateral rotation are achieved in a fluidizable bed (10).