The linear temperature dependent electrical conductivity relations were obtained. Bubbling was observed above 60 C especially at
high voltage gradients. The ohmic heating system performance coefficients were in the range of 0.49–1.00. The unsteady-state heat
conduction equation for negligible internal resistance was solved with an ohmic heating generation term by the finite difference technique.
The predictions of the mathematical model using obtained electrical conductivity equations were found to be very accurate.
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