マイクロスケール赤外・可視観察による多孔質熱流動特性の把握

(濡れ性改善に伴う熱伝達特性の向上)

抄録

This paper reports the characteristics of thermo-fluid behavior in a wick that is fine porous structure and the effect of wick’s wettability improvement on the heat transfer coefficient. In this study, visualization of liquid-vapor interface behavior on the surface of the wick with microscopic infrared thermography and microscope was conducted. 2 wicks were made by stainless steel (SS). The acid treatment with hydrochloric acid was processed to one wick in order to improve the wettability. Contact angle changed from 10.7° to 0 ° after acidizing. As results, heat transfer coefficient of the wick with acid treatment became higher at 5.0~5.5W/cm². The reason of this trend is discussed based on the observation results.