Gas–liquid-solid fluidized beds are broadly utilized in the petrochemical, pharmaceutical, refining, food, biotechnology, and environmental industries. Due to complex phenomena, such as particle-particle, liquid-particle, particle-bubble interactions, hydrodynamics, heat transfer of three-phase (gas-liquid-solid) beds, they incompletely understood. The ability accurately predict essential chara...

Gas-liquid-solid fluidized bed technique has emerged recently as one of the most promising one for three phase operations involved in chemical, biochemical, petrochemical, pharmaceutical processing industries. Out of the fundamental characteristics of a three-phase fluidized bed, the gas hold up and liquid hold up behaviours have been studied extensively. Considering the various researchers’ fi...

Objects released into a granular packing close to incipient fluidization may float or sink depending on their density. Contrary intuition, earlier work reported that under certain conditions, lighter sphere can further and slower than heavier one. In this study, we reveal the mechanism of intriguing phenomenon using both magnetic resonance imaging discrete particle simulation. Our findings sugg...

In recent years, the discrete element method (DEM) has gradually been applied to traditional fluidization simulation of fine particles in a micro fluidized bed (MFB). The application DEM simulating fast MFB not yet received attention. This article presents drag model that relies on surrounding environment particles, namely particle circumstance-dependent or PCDD model. Fast an is simulated usin...

We report the simultaneous characterization of timeand force-dependent mechanical properties of adherent cells in the physiologically relevant regime of large forces. We used magnetic tweezers to apply forces to magnetic beads bound to the cytoskeleton, and recorded the resulting deformation (creep response). The creep response followed a weak power law at all force levels. Stress stiffening an...

We propose that data-symbolization methods derived from nonlinear dynamics and chaos theory can be useful for characterizing and monitoring patterns in fluidized-bed measurement signals. Data symbolization involves the discretization of a measurement signal into a limited set of values. In this discretized form, the measurements can be processed very efficiently to detect dynamic patterns that ...

Creep experiments on polycrystalline surfactant hexagonal columnar phases show a power law regime, followed by a drastic fluidization before reaching a final stationary flow. The scaling of the fluidization time with the shear modulus of the sample and stress applied suggests that the onset of flow involves a bulk reorganization of the material. This is confirmed by x-ray scattering under stres...