A Study on Effects of Surface Structure Clearance in Nanometer Scale on Energy Transfer at an Interface

Energy transfer from fluid to a surface was calculated by using the classical molecular dynamics method in order to investigate effects of surface structure clearances in nanometer scale on surface energy transfer numerically. Surface structures on the constant surface area were composed of several hundred atoms having the same thermal properties. Upper region in the calculation domain was controlled at a constant temperature and the solid atomic layer at lower region was controlled at a constant temperature so as to make a temperature gradient in the calculation system. Fluid molecular diffusion in the vicinity of the surface was dependent on characteristic length scale of the surface structure cleamces in nanometer scale that affected the dynamic behaviors of fluid molecules in the vicinity of the surface. The effect to fluid molecular diffusion was observed within 2 nm distance in the present calculation conditions.