Electrostatic Levitation Technique for Thermo- Physical Property Measurements of Molten Materials on Earth and in Space

نویسنده

  • W. K. Rhim
چکیده

Themophysical properties of high temperature molten materials are mczsured using an electrostatic levitator in combination with several diagnostic devices. An objective of this study is to find the limitation of the earth-based measurements in order to evaluate the necessity of similar measurements in space. It is found that the hemispherical total emissivity, specific heat, specific volume, density and surface tension can be satisfactorily measured by the earth-based measurements. The viscosity measurement is not conclusive because of the suspected interference by the levitation force on the measurement. Further investigation is necessary to elucidate the degree of the interference by performing the same measurement under a short duration microgravity environment realized on earth.

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تاریخ انتشار 1999