Influence of transverse rotating magnetic field on enhancement of solid dissolution process

Abstract

in Wiley InterScience (www.interscience.wiley.com).The main objective of this work is to study the effect of transverse rotating magnetic field (TRMF) on the enhancement of solid dissolution process in the novel type reactor (TRMFR). The application of magnetically driven fluidization (MDF with homogeneous and heterogeneous systems) on mass transfer process is presented. A study of the effect of ferromagnetic particles content on solid-liquid mass transfer has been made. The experimental investigations are provided for the explanation of the influence on the dissolution process of a solid body to surrounding its dilute solution in a novel type reactor with the ferromagnetic particles suspended. The mass transfer coefficient is calculated from a kinetic equation and correlated in the relationship including standard and magnetic dimensionless numbers. The overall enhancements due to TRMF and MDF were compared. Unique correlating relations were obtained to generalize the experimental database.

Modification of bacterial cellulose through exposure to the rotating magnetic field

“…The SMF is characterized by steady direction, flow rate and strength (thus a frequency of 0 Hz) (Shanmugapriya et al, 2012). In contrast to SMF, the RMF (as time varying magnetic field) reverses their direction at a regular frequency and this kind of field rotates around the generator axis with the constant angular frequency (Rakoczy & Masiuk, 2010). In the present study the frequency was equal to 50 Hz (it was equal to the frequency of the alternating current which supplies the windings).…”

Effect of magnetic field on the zero valent iron induced oxidation reaction

“…Another effect is to increase the dissolution of iron. Rakoczy reported that rotating magnetic field enhances solid dissolution process [19,20]. MF can also influence the lifetime of radicals by inhibiting their recombination reactions through the interaction with electron spins [21].…”

Forced Convection Mass-Transfer Enhancement in Mixing Systems

“…After finishing the cycle of dissolving, the agitator was stopped, and then the loss of mass had been read on electronic scale and concentration of NaCl (electrical conductivity) in the mixer as well. This connection is given by a calibration curve, showing the dependence of the relative mass concentration of NaCl on the electrical conductivity (Rakoczy & Masiuk, 2010). (44) is useful to generalize the experimental data in this work for the whole region of the reciprocating Reynolds number without the break of the correlating graphical line.…”

“…The influence of TRMF on mass-transfer process is manifested by the magnetic force defined as the divergence of Maxwell's stress tensor and expressed by the following relation (Rakoczy & Masiuk, 2010) V -liquid volume exposed to TRMF, m 3 ; μ m -magnetic permeability, kg·m·A -2 ·s -2 .…”