An Analytical and Experimental Study of Combined Conduction-Radiation Energy Transfer in Stagnant Water,

摘要

The transient heating by radiation of a stagnant layer of water was studied both analytically and experimentally. Solar radiation (insolation) was simulated by tungsten filament lamps in parabolic reflectors of known spectral characteristics. The volumetric rate of internal absorption of radiation was predicted by considering spectral absorption,scattering,and multiple forward scattering by the water according to the model of Viskanta and Toor. The transient temperature distribution was predicted by solving the one-dimensional energy equation analytically in closed form after first linearizing the boundary condition at the air-water interface.