自然界面を有する水平容器内に発現する自然対流の熱流動とプラントル数の影響について

抄録

In recent years, new measurement and inspection techniques using infrared thermography are applied in various research and development fields. One of the advantages of infrared thermography is the ability to measure time series two-dimensional surface temperature distributions without contact. In this report, three kinds of different silicone oil (100cs, 1000cs, 5000cs) are used as test fluids. The silicone oil is filled in a horizontally open rectangular container and the heat flow phenomenon while heating from the bottom is visualized by an infrared camera. Heat transfer characteristic of natural convection obtained by experiments are compared with the conventionally proposed heat transfer correlation formula. Experimental results show that the natural convection does not develop as Prandtl number increases. The Rayleigh number increases as the amount of heating increases, and the heat flow phenomenon is related to the Rayleigh number.