Hydrodynamic Behaviors in Gas‐Solid Two‐Phase Magnetic Fluidized Beds 1. Experimental Results Represented by a Dimensionless Number

Abstract

The influence of magnetic field intensity and process parameters on the transient fluidization behaviors of magnetically stable fluidized beds (MSFBs) was studied. The local solid holdup distribution and magnetically stabilized regimes were carried out by experimental measurements in MSFBs. The scaling approach for MSFB hydrodynamics based on magnetic field and dynamic similitude with a limited number of dimensionless groups was tested. A dimensionless number for magnetic field has been developed. An experimental criterion for the magnetically stabilized fluidization is established based on random analysis of the void fluctuation signal. It includes two characteristic parameters of the main frequency of voidage fluctuation signals, i.e., the self-correlation function and variance. A dimensionless correlation to calculate the stable zone with three dimensionless groups of Er, Ar, and Re was proposed using dimensionless analysis.

Characteristics of a Pressurized Gas‐Solid Magnetically Fluidized Bed

“…The gas-solid magnetically fluidized bed (MFB) has been regarded as a useful process intensification strategy and has attracted increasing interest in industrial applications such as petroleum chemical processes, fine-chemical production and separation processes, because of the major advantages of good residence time distribution, small bubble size, low pressure drop, and a wide operation range of flow velocity [1][2][3][4][5][6]. Recently, some published articles indicated that an MFB demonstrates better performance in various circumstances when it is pressurized.…”