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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
An (Part II: Hydrodynamic Behavior of Water and Ethanol under Microwave Heating and
Reduced Pressure) [PDF] |
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AUTHORS |
D. Stuerga
and M. Lallemant 1996 28 4 219-233 |
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Abstract The purpose of this work is the comparison between hydrodynamic behaviour observed during water and ethanol evaporation induced by microwave heating and simultaneously under reduced pressure, in order to generalize the specificity of microwave heating in relation to the thermal dependency of dielectric loss. Spatial thermal profiles, bulk and interfacial temperatures, as well as the kinetic measurements are presented. Diagrams are proposed in order to give a comparison between the behaviour obtained for water and ethanol. A comparison between evaporation induced by reduced pressure and microwave heating is also made. For water the steady processes are preponderant, whereas for ethanol the behaviour is quite turbulent. These experimental results have shown a strong stabilization of the liquid bulk for water. For ethanol microwave heating seems a stochastic favour which easily induces turbulence. Key Words: Evaporation Hydrodynamic instabilities, Microwave
heating. Rayleigh-Bérnard, Marangoni, Hickman, Ethanol, Water |
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