Effect of Radiation on Surface Wettability under High-Temperature and High-Pressure Environment(<Special Issue>Challenge to Ultimate Cooling Technique Using Phase Change Process)

Temperature Dependence of the Dynamic Contact Angles of Water on a Smooth Stainless-Steel Surface under Elevated Pressures

“…The measurements of SCA of water on SS304 surfaces up to 300 °C were conducted by Song et al, 30 Hayashi et al, 26 and Hazuku et al 28 The three data sets show a good qualitative agreement in the observed trends. It is clear that the temperature at which the SCA shows a clear downward trend is about 120 °C, much lower than that associated with the ACAs in this study.…”

“…The temperature dependence of the DCAs exhibits a different pattern as compared to the piecewise linear decline of SCA. 26,28,30,32 The ACA shows a "first flat then declining" trend, while the RCA shows a "first declining then flat" trend. The ACA maintains nearly constant and does not decrease until the temperature is close to the saturated temperature.…”

“…Bernardin et al measured the SCA of water on an aluminum surface at temperatures up to 170 °C and pressures up to 0.84 MPa and observed two distinct temperature-dependent regimes. To explore the temperature dependence under higher temperature and pressure conditions, the pressure vessels capable of reaching higher parameters were designed by the group of Takamasa, − the group of Bucci, , and the group of Fan. − In these studies, the temperature dependence of the contact angle of water on metal surfaces such as stainless steel, aluminum, and zircaloy was investigated under elevated temperatures up to 300 °C and elevated pressures up to 15 MPa. Despite the slight quantitative difference, the temperature dependence of the contact angles of water has a good qualitative agreement that it exhibits a piecewise-linearly decreasing trend as increasing the temperature.…”