INTERACTION EFFECTS ON FLUID DYNAMICS OF BUBBLES IN A FLUIDIZED BED - CHAIN OF RISING BUBBLES IN AN INFINITE 2-DIMENSIONAL MEDIUM

A theoretical examination was made of the particle movement and gas flow associated with a rising chain of equally sized and spaced bubbles in a two-dimensional bed. The area of particle drift caused by a bubble within a chain of bubbles and the area of the gas cloud per bubble in a chain of bubbles are generally greater than for a single bubble in an infinite medium. When the bubble spacings are small and ratios of bubble velocity to interstitial gas velocity are low, the gas clouds associated with adjacent bubbles come into contact and form a gas envelope. Within this envelope are two major gas flows: flow from within one bubble upward to the leading bubble and a circulating flow from within one bubble and back into the same bubble. © 1969, American Chemical Society. All rights reserved.