Abstract
Under the microgravity environment, new and high quality materials with a homogeneous crystal structure are expected to be manufactured by undercooling solidification, since the material manufacturing under the microgravity environment is more static than that under the normal gravity. However, the temperature change on the interface of the material in space can affect on the material processing. The purpose of the present study is to investigate effect of the temperature change of interface on the large levitated droplet interface. A water droplet levitated by the acoustic standing wave is heated by YAG laser. In order to heat the water droplet by the laser heating, rhodamine 6G is solved in it to achieve high absorbance of the laser. The droplet diameter is from 4 to 5.5 mm. The deformation of the droplet interface is observed by high speed video camera. The temperature of droplet is measured by the radiation thermometer. It is noticed that the larger droplet under the higher sound pressure tends to oscillate remarkably by the laser heating.
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Kawakami, M., Abe, Y., Kaneko, A. et al. Effect of Temperature Change on Interfacial Behavior of an Acoustically Levitated Droplet. Microgravity Sci. Technol. 22, 145–150 (2010). https://doi.org/10.1007/s12217-009-9167-z
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DOI: https://doi.org/10.1007/s12217-009-9167-z