Analysis is developed for the time dependent thermal stratification in surface layers of stagnant water by solar radiation. The transient temperature distribution is obtained by solving the one-dimensional energy equation for combined conduction and radiation energy transfer using a finite difference method. Experimentally, solar heating of water is simulated using tungsten filament lamps in parabolic reflectors of known spectral characteristics. The transient temperature distribution resulting from radiant heating of pure water in a glass-walled test cell is measured with a Mach-Zehnder interferometer. Measured and predicted temperature profiles show good agreement, thus verifying the radiation and total energy transfer models in stagnant water. It is found that the boundary condition at the air-water interface and internal radiant heating rate must be correctly specified in order to properly model stratification of water by radiation.
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Radiation Induced Thermal Stratification in Surface Layers of Stagnant Water
D. M. Snider,
D. M. Snider
School of Mechanical Engineering, Purdue University, West Lafayette, Ind.
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R. Viskanta
R. Viskanta
School of Mechanical Engineering, Purdue University, West Lafayette, Ind.
Search for other works by this author on:
D. M. Snider
School of Mechanical Engineering, Purdue University, West Lafayette, Ind.
R. Viskanta
School of Mechanical Engineering, Purdue University, West Lafayette, Ind.
J. Heat Transfer. Feb 1975, 97(1): 35-40 (6 pages)
Published Online: February 1, 1975
Article history
Received:
August 16, 1974
Online:
August 11, 2010
Citation
Snider, D. M., and Viskanta, R. (February 1, 1975). "Radiation Induced Thermal Stratification in Surface Layers of Stagnant Water." ASME. J. Heat Transfer. February 1975; 97(1): 35–40. https://doi.org/10.1115/1.3450284
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