| Citation | Professor Jackson is distinguished for seminal research on the stability of a dispersion of particles supported by up-flowing gas. This work led to the prediction of voidage waves, subsequently observed in fluidized beds. He also pioneered theory describing the flow of particles round a gas bubble rising in a fluidized bed and gave the first proper analysis of densely-packed particle flow down a vertical stand-pipe. His work on upward motion of a gas-particle mixture in a pipe provides a rational explanation of particle accumulation near the walls. Recently he has taken up the general problem of flow of gas-free granular material. He has made notable contributions to optimization theory for chemically reacting systems |