A comparison of one-dimensional traveling waves in inverse and normal fluidized beds

摘要: Abstract The state of uniform fluidization is usually unstable to small disturbances, and this can lead the formation vertically traveling voidage waves. In inverse fluidization, when particle density less than fluid ( ρ s f ), particles fluidize in direction gravity drag force exerted by overcomes buoyancy. Inverse thus provides a unique parameter space, which augments study instability behavior normal . Using continuum equations continuity motion, we compared linear stability bed modes examine effect Froude number (Fr) solid ratio δ = / ). Making use numerical bifurcation analysis continuation, periodic solutions form one-dimensional waves (1D-TWs) were computed. Based on wave growth rates structure, identified Fr as an important for predicting strength. However, affects onset, or point at base rendered unstable. case studies examined, shown propagate asymmetrical, high amplitude 1D-TW profiles suggest fully developed bubble-like structures are oriented fluidization.