Numerical analysis of the close-contact heat transfer of the electro-thermal drilling probes for glacier-ice exploration
| Autor: | Chan Ho Jeong, Hyung Ju Lee, Kwangu Kang, Jin-Yeong Park, Seong Hyuk Lee, Ui-Joon Park |
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| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering Numerical analysis Enthalpy Drilling 02 engineering and technology Mechanics 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering Mechanics of Materials Thermal Heat transfer Stage (hydrology) Layering Porosity |
| Zdroj: | Journal of Mechanical Science and Technology. 35:1309-1317 |
| ISSN: | 1976-3824 1738-494X |
| DOI: | 10.1007/s12206-021-0242-8 |
| Popis: | The present study aims to numerically investigate the thermal characteristics of the drilling probe for glacier-ice exploration with consideration of close-contact heat transfer between the electro-thermal probe and the ice. The commercial program of Ansys Fluent (v.17.2) was used, and the enthalpy porosity method was adopted for simulating the phase change heat transfer. The dynamic layering method was also used to move the computational mesh with a given speed for understanding the correlation between the moving speed and the thermal characteristics. It is found that the thin liquid layer increases with the heating power imposed on the probe, and the molten liquid radially moves in the thin liquid layer, which is much thinner than the probe size. Also, the growth rate depends on the heating power, especially in the early stage of drilling. Moreover, the probe velocity significantly affects the evolution of the thin liquid layer. |
| Databáze: | OpenAIRE |
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