Behavior of fluidized beds similar to equilibrium states

TL;DR

This study uses simulations to explore the behavior of fluidized beds, revealing a continuous transition between phases and similarities to equilibrium states in dense liquids, with flow rate acting as an effective temperature.

Contribution

The paper demonstrates that fluidized beds exhibit a continuous transition and identifies two distinct phases, linking their behavior to quasi-equilibrium states in dense liquids.

Findings

Fluidization is a continuous transition.

Existence of channeling and bubbling phases.

Flow rate acts as an effective temperature.

Abstract

Systematic simulations are carried out based on the model of fluidized beds proposed by the present authors [K.Ichiki and H.Hayakawa, Phys. Rev. E vol.52, 658 (1995)]. From our simulation, we confirm that fluidization is a continuous transition. We also confirm the existence of two types of fluidized phases, the channeling phase and the bubbling phase. We find the close relations between the averaged behaviors in fluidized beds and quasi equilibrium states in dense liquids. In fluidized beds, (i) the flow rate plays the role of the effective temperature, and (ii) the existence of a kind of the fluctuation-dissipation relation is suggested.