A model is developed for the rate of salt deposition by natural convection from aqueous salt solutions onto a horizontal cylinder heated beyond the solubility temperature for the dissolved salt. The model accounts for the deposition rate at the salt layer-solution interface (SLSI) formed on the cylinder, but it does not account for deposition which may occur inside the porous salt layer (PSL). Dissolved salt is transported to the SLSI by molecular diffusion (with advection) and subsequently nucleates heterogeneously there. The model is applied to the experimental deposition rate data acquired by Hodes et al. (1998, 2002) at conditions pertinent to Supercritical Water Oxidation (SWCO). The ratio of the predicted deposition rate to the measured one ranges from roughly 0.5 to 2 indicating that deposition inside the PSL can be considerable.
A Natural Convection Model for the Rate of Salt Deposition From Near-Supercritical, Aqueous Solutions
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division June 10, 2002; revision received June 3, 2003. Associate Editor: K. S. Ball.
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Hodes, M., Smith, K. A., and Griffith, P. (November 19, 2003). "A Natural Convection Model for the Rate of Salt Deposition From Near-Supercritical, Aqueous Solutions ." ASME. J. Heat Transfer. December 2003; 125(6): 1027–1037. https://doi.org/10.1115/1.1603772
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