THERMAL FLUID DIFFUSION AND ADVECTION PHENOMENA IN POROUS MEDIA BY BEACH OF IBUSUKI COAST

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  • 指宿港海岸における地下熱流体の移流拡散現象の検討

Abstract

<p> Sand steam hot spring using underground hot spring water has been used for a long time on the sandy beach of Ibusuki coast of Ibusuki city, Kagoshima prefecture. In recent years, a coastal maintenance project has been implemented in this coastal area. Therefore, detailed on-site observation has carried out about the effusion of underground hot spring water. In this paper, we developed a multiphase flow solver that adds a calculation term to reproduce flow and temperature fields in porous media. Then, we examined the influence of the tide level on the temperature in the sandy beach and the effusion of the hot spring water. As a result, it was possible to reproduce the phenomenon that the temperature field in the sandy beach fluctuate greatly with the tide level fluctuation. And we clarified the phenomenon that the vertical upward flow was always generated at the shoreline position at the time of the low tide.</p>

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