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Figure 8.18 Electric field strength (left) and magnetic flux density (right) fields (Morega et al., 2014).
dependency of the properties on temperature is not negligible, and the two problems are
two-way coupled—for each step of temperature rise, the dielectric properties are adjusted and
the electromagnetic problem is solved again, so the electric field and the resistive heat are
temperature-dependent quantities.
One could consider, for biological tissues with high water content, the temperature
dependence suggested in (Morega et al., 2008; Nikawa, 1995) for dielectric proper-
ties—electric conductivity, σ, and relative permittivity, ε r (T is in kelvins)
½
ð
½
σ TðÞ 5 σ 1 1 0:005 T 2 310ð ÞS=m and ε r TðÞ 5 ε 1 2 0:027 T 2 310Þ; ð8:15Þ
r
Figure 8.19 Temperature (slice color map in Celsius) and flow (pressure color map) fields
(t 5 480 s) (Morega et al., 2014).
