Thermophysical Properties of Molten Platinum
Carty, Sarah M.
2019
- The goal of this research is to gather the density, surface tension, and viscosity used to select fluid flow conditions during molten metal processing on Earth. Containerless levitation serves as a model system since it is not susceptible to contact with any contaminated surface and thus provides a baseline for data acquisition and optimization of analysis techniques for future experiments ... read moreaboard the International Space Station. Thermal cycles and induced oscillations were performed on several similar spherical platinum samples in the Electrostatic Levitator (ESL) at NASA Marshall Space Flight Center. Data processing was performed using high-speed photography, infrared pyrometry, and numerical analysis. A range of values for the density of platinum was determined to be 21261.42 ± 155.60 kg/m3, with a thermal expansion coefficient of -1.2368 ± 0.085. The surface tension of platinum was determined to be 1.715 N/m. These values compare favorably to existing literature values of density and surface tension. For platinum samples of around 2mm in diameter, the natural frequency of oscillation was approximately 147 Hz in the ESL. The value determined for the viscosity of platinum, 0.0103 Pa*s, was greater than published values by a factor of nearly 2 but was compared to limited available literature on the subject.read less
- ID:
- c821gx76m
- To Cite:
- TARC Citation Guide EndNote
- Usage:
- Detailed Rights