Biomedical Engineering Reference
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as compared to other existing techniques, will be also addressed through the
chapter. At the end, some conclusions are presented.
12.2 Historical Overview of Magnetically Stabilized and
Fluidized Beds
12.2.1 General
The first paper published on magnetically fluidized beds (MFBs) as an all, was
by Kirko and Filipov (1960). Filipov further developed this subject by inves-
tigating the behavior of a fluidized bed of iron particles under the influence of
a magnetic field and of a water stream (Filipov et al. 1961a,b; Filipov 1962),
which complemented by the works of Nekrassov and Chekin (Nekrassov and
Chekin 1956, 1961), initiated the investigation and development of the MFBs
and MSBs beds. Figure 12.1 represents the device studied and developed by
Filipov. Many publications on the subject have followed this breakthrough,
and, as examples, we may stand out the following works: Rosensweig (1979)
presented the first basic description of MSB and claimed that Filipov and the
other previous researchers apparently did not realized the importance of the
orientation and uniformity of the applied field, besides having neglected the
existence of a distinct range of superficial gas velocities between the minimum
fluidization velocity and the transition velocity (Liu et al. 1991). Ivanov,
Zrunchev, Popova, and Grozev (Ivanov and Grozev 1970; Zrunchev 1975;
D2
E
C
∆p
A
B
D1
FIGURE 12.1
The first setup of a magnetically fluidized bed for the treatment of gases
(based on Filipov [1961a] and Hristov [2002]). A—magnetically fluidized bed;
B—magnetic field generator; C—measure of pressure drop in the bed; D—air
flow: 1- entrance, 2—exit; E—Periscope.
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