Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	A Original Way to Select and Control Hydrodynamic Instabilities: Microwave Heating. Part III: Linear Stability Analysis [PDF]
AUTHORS	D. Stuerga, A. Streichen-Sanfeld and M. Lallemant 1994 29 1 3-18
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Abstract The purpose of this work is the comparison between hydrodynamic behaviors observed during water and ethanol evaporation induced by microwave heating and simultaneously under reduced pressure, in order to generalize the specificity of the microwave heating in relation to thermal dependency of the dielectric loss. Hydrodynamic concepts are used to justify experimental observations described in a previous paper. Contribution of microwave irradiation is clearly defined in terms of selectivity of hydrodynamic instabilities. Transition between conductive regime to convective regime (Rayleigh-Bénard instability) is made. Coupling between surface instabilities are also examined. According to these theoretical results microwave irradiation seems to be a tool which permits to control the shape of the spatial thermal profile in relationship to intrinsic properties of liquid to be controlled. Key Words: Evaporation, Hydrodynamic instabilities, Microwave heating, Rayleigh-Bénard, Marangoni, Hickman, Linear stability analysis.