Meandering instability is familiar to everyone through river meandering or small rivulets of rain flowing down a windshield. However, its physical understanding is still premature, although it could inspire researchers in various fields, such as nonlinear science, fluid mechanics and geophysics, to resolve their long-standing problems. Here, we perform a small-scale experiment in which air flow...

Simulations of gas-solid fluidized beds have been performed using a hybrid simulation method, which couples the discrete element method (DEM) for particle dynamics with the averaged two-fluid (TF) continuum equations for the gas phase. The coupling between the two phases is modeled using an interphase momentum transfer term. The results of the hybrid TF-DEM simulations are compared to experimen...

The present study attempts to summarize the salient characteristics of hydrodynamics behavior of inverse fluidized system, effect of particles properties, various phenomena that affect the fluidization like bubble formation, fluid velocity and its various uses in commercial scale by reviewing the previous literature. Governing mechanisms of inverse fluidization system and some heat and mass cor...

Understanding the relationship between processing parameters of fluidized bed wet granulation and the characteristics of intermediate and final products is crucial in the pharmaceutical processes. This research examined a fluidized bed wet granulation process containing a cornstarch solution as binder and lactose particles as powder. The design of experiment (DoE) was performed according to an ...

the control of fluidized-bed operations processes is still one of the major areas of research due to the complexity of the process and the inherent nonlinearity and varying dynamics involved in its operation. there are varieties of problems in chemical engineering that can be formulated as nonlinear programming (nlps). the quality of the developed solution significantly affects the performance ...

In the present study, dry reforming of methane (DRM) has been simulated in fluidized-bed reactors using multiphase particle-in-cell model. The model was meticulously built to investigate effect a wide range superficial gas velocities covering particulate, aggregative, and lean-phase flow regimes on bed hydrodynamics, conversion, yields product gases. Constant values for catalyst loading, CH 4 :...

The process of fluidized bed spray granulation unites the steps of solid formation and product formulation in one apparatus and is used to produce granules out of a liquid. Thereby, a melt is atomized into small droplets and sprayed into the fluidized bed, which consists of seed particles of the same material. Droplets deposit on the particles near the spray zone and form a film which solidifie...

The control of fluidized-bed operations processes is still one of the major areas of research due to the complexity of the process and the inherent nonlinearity and varying dynamics involved in its operation. There are varieties of problems in chemical engineering that can be formulated as NonLinear Programming (NLPs). The quality of the developed solution significantly affects the performa...

This article describes the bed expansion characteristics of a down-flow anaerobic fluidized bed reactor treating a synthetic wastewater. Experiments were carried out in a 0.08 m diameter and 1 m length PVC column. The carrier used was ground perlite (an expanded volcanic rock). Particles characteristics were 0.968 mm in diameter, specific density of 213 kg x m-3 and Umf (minimal fluidization ve...