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Microwave and Radio-Frequency Technologies in Agriculture by Peter Farrell, Mohan V. Jacob, Graham Brodie

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13 Dielectric Heating

Heat transfer analysis predicts the energy movement that occurs when there is a spatial temperature gradient. Thermodynamics predicts that energy, in the form of heat, moves along the temperature gradient until all spatial coordinates reach thermal equilibrium. By definition, equilibrium is reached when the temperature gradient disappears from the system.

Heat is transferred by conduction, convection and radiation. Conduction is the transfer of heat between material interfaces. Convection is the transfer of heat between an object and its environment due to fluid motion, i.e. a gas or liquid interface with a solid. Radiation is the transfer of heat between bodies through the emission and absorption of electromagnetic energy, ...

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